MODULE 1 RUNOFF HYDROGRAPHS WORKSHEET 1. Precipitation
|
|
- Della Thomas
- 6 years ago
- Views:
Transcription
1 Watershed MODULE 1 RUNOFF HYDROGRAPHS WORKSHEET 1 A watershed is an area of land thaaptures rainfall and other precipitation and funnels it to a lake or stream or wetland. The area within the watershed where the rainfall event occurs is called the catchment area. In engineering applications, these terms are used interchangeably. The catchment is also called a drainage basin or a drainage area. The surface runoff from a rainfall event in a watershed is captured an outlealled catchment outlet or pour point. Precipitation Rainfall data is collected by National Weather Service (NWS) manually using a standard 8inch rain gage or an automaticrecording rain gages such as the tipping bucket rain gage. Rain gage measurements are point measurements and can be representative of a small area of 25 km 2 (10 mi 2 ). NWS uses next-generation radar (NEXRAD) to obtain areal measurement of rainfall. These weather stations are capable of measuring weather activity within 230 km radius. In engineering design, we use historical or statistical measurement of rainfall represented in the form of Intensity-Duration-Frequency (IDF) curves. These curves express the relationship between the average intensity of a rainstorm during an average time for a probability of occurrence. An example IDF curve is shown in the Figure above. These curves are developed by using the average maximum rainfall data using statistical methods. Things to note from a IDF curve: The rainfall intensity increases as the duration decreases The rainfall intensity increases as the return period increases. The probability of a rainfall event with high intensity is low. In United States, the frequency of local rainfall distributions was published by Hershfield in 1961, this is commonly referred to as TP-40 (Technical Paper 40 published in NWS). These frequency distributions were derived from data from 4000 stations assuming a Gumbel distribution. When IDF curves are not available, we use a methodology proposed by Chen. Chen (1983) uses the three rainfall depths derived from TP-40 (R "# ", R "# "## %&, R " ) and proposed a relationship between average intensity, i (in/hr) for a rainfall of duration, t (min), by i = a t + b "." (1) 1
2 where a, b 1, c 1 are empirical functions of the three depths derived from TP-40. A typical runoff hydrograph is shown below Rainfall excess is defined as the total rainfall minus the abstractions such as infiltration. Overland runoff occurs when the rainfall rate exceeds the infiltration capacity of the soil. Runoff models are classified as either Distributed parameter models small areas such as roof, lawn streets etc Lumped parameter models used for large catchments where the processes are lumped into one parameter We generally use hydrographs to understand the catchment response to a rainfall. Hydrographs show the temporal variation of rainfall at the catchment outlet (D shown in the Figure). It is possible to understand the characteristics of a catchment such as the slope, type of terrain etc by looking at the hydrograph. Hydrographs are extensively used in flood routing and storage calculations in stormwater management systems. 2
3 Time of concentration Longest travel time that it takes for surface runoff to reach the discharge point of a catchment. This is a function of effective rainfall intensity (i e ), catchment length scale (L), average catchment slope, S 0, the type of catchment surface (C) Different empirical methods are used to compute the time of concentration ( ) (a) NRCS method = 5.5 P 24 nl S o where is the time of concentration in minutes, P 24 is the 2-year 24-hour rainfall in mm, L is the length of the catchment in m, n is the Manning s roughness coefficient for overland flow; and S o is the ground slope (b) Kirpich equation 4/5 (2) = L0.77 S (3) where tc is the time of concentration in minutes, L is the flow length in m, So is the average slope along the flow path. This was primary developed in wooded agricultural catchments in Tennessee. Rossmiller suggested that for concrete or asphalt, the calculated should be multiplied by 0.4. (c) Izzard equation = 530KL1/3 i e 2/3 where i e L<3.9 m 2 /h (4) where L is the overland-flow distance in m, ie is the effective rainfall intensity (mm/h) and K is a constant given by K= i e + c r S 0 1/3 (5) c r is the retardance coefficient that is determined by the catchment surface as given in the Table 10.4 of the textbook. (d) Kerby Equation = 1.44 Lr S where L is the length of flow in m, r is the retardance roughness coefficient given in Table 10.5 of the textbook and So is the slope of the catchment. (6) 3
4 (e) Kinematic wave equation = 6.99 i e 2/5 nl S o 3/5 where is time in minutes, i e in mm/h, L is the length of the catchment in m, n is the Manning s roughness coefficient for overland flow; and S o is the ground slope (7) Problem 1 An urban catchment with an asphalt surface has an average slope of 0.5%, and the distance from the catchment boundary to the outlet is 90 m. At the catchment location, the 2-year 24-hour rainfall is estimated as 50 mm. For a 20-min storm with an effective rainfall rate of 75 mm/h, estimate the time of concentration using all the empirical equations 4
5 The Rational Method The rational method is a widely used peak-runoff model in urban hydrology. This is used to calculate the peak runoff (Q p ) for a given rainfall intensity (i) as follow where C is the runoff coefficient, and A is the area of the catchment Assumptions: Q p = CiA 1. Entire catchment area is contributing the runoff (duration of the rainfall is equal to the time of concentration) 2. Rainfall is distributed uniformly over the catchment 3. All catchment losses are incorporated into the runoff coefficient, C 5
6 Problem 2 A new 1.2 ha suburban residential development is to be drained by a storm sewer thaonnects to the municipal drainage system. The development is characterized by an average runoff coefficient of 0.4, a Manning s n for overland-flow of 0.2, an average overland-flow length of 70m and an average slope of 0.7%. The time of concentration can be estimated by the kinematic wave equation. Local drainage regulations require that the storm-sewer pipe be sized to accommodate the peak runoff rate resulting from a 10-year rainfall event. The 10-year IDF curve is given by i = t where i is the rainfall intensity in cm/h and t is the duration in minutes. Location regulations further require a minimum time of concentration of 5 mins. Determine the peak runoff rate to be handled by the storm sewer. 6
7 Problem 3 Consider the case where the residential development described in the above problem contains 0.4 ha of the impervious area that is directly connected to the storm sewer. If the runoff coefficient of the impervious area is 0.9, Manning s n for overland flow on the impervious surface is 0.03, the average flow length is 20 m and the average slope 0.1%, estimate the design runoff rate to be handled by the storm sewer. 7
The Islamic University of Gaza- Civil Engineering Department Sanitary Engineering- ECIV 4325 L5. Storm water Management
The Islamic University of Gaza- Civil Engineering Department Sanitary Engineering- ECIV 4325 L5. Storm water Management Husam Al-Najar Storm water management : Collection System Design principles The Objectives
More informationOverland Flow Time of Concentration on Very Flat Terrains
Overland Flow Time of Concentration on Very Flat Terrains Ming-Han Li and Paramjit Chibber Two types of laboratory experiments were conducted to measure overland flow times on surfaces with very low slopes.
More informationRainfall, Runoff and Peak Flows: Calibration of Hydrologic Design Methods for the Kansas City Area
Rainfall, Runoff and Peak Flows: Calibration of Hydrologic Design Methods for the Kansas City Area Bruce McEnroe, Bryan Young, Ricardo Gamarra and Ryan Pohl Department of Civil, Environmental, and Architectural
More informationOverview of NRCS (SCS) TR-20 By Dr. R.M. Ragan
Overview of NRCS (SCS) TR-20 By Dr. R.M. Ragan TR-20 is a computer program for the simulation of runoff occurring from a single storm event. The program develops flood hydrographs from runoff and routes
More informationChapter 4 "Hydrology"
Chapter 4 "Hydrology" Revised TxDOT Hydraulics Manual Jorge A. Millan, P.E., CFM TxDOT Design Division/Hydraulics 2012 Transportation Short Course October 17, 2012 Chapter 4 Sections 1 Hydrology s Role
More informationCHAPTER 3 STORMWATER HYDROLOGY. Table of Contents SECTION 3.1 METHODS FOR ESTIMATING STORMWATER RUNOFF
CHAPTER 3 STORMWATER HYDROLOGY Table of Contents SECTION 3.1 METHODS FOR ESTIMATING STORMWATER RUNOFF 3.1.1 Introduction to Hydrologic Methods...3.1-1 3.1.2 Symbols and Definitions...3.1-3 3.1.3 Rainfall
More informationAPPENDIX IV. APPROVED METHODS FOR QUANTIFYING HYDROLOGIC CONDITIONS OF CONCERN (NORTH ORANGE COUNTY)
APPENDIX IV. APPROVED METHODS FOR QUANTIFYING HYDROLOGIC CONDITIONS OF CONCERN (NORTH ORANGE COUNTY) Hydromodification design criteria for the North Orange County permit area are based on the 2- yr, 24-hr
More informationiswm TM Technical Manual Hydrology:
: 1.0 2.0 Downstream Assessment 3.0 Streambank Protection 4.0 Water Balance 5.0 Rainfall Tables 6.0 Hydrologic Soils Data Table of Contents 1.0... HO-1 1.1 Estimating Runoff... HO-1 1.1.1 Introduction
More informationThe Texas A&M University and U.S. Bureau of Reclamation Hydrologic Modeling Inventory (HMI) Questionnaire
The Texas A&M University and U.S. Bureau of Reclamation Hydrologic Modeling Inventory (HMI) Questionnaire May 4, 2010 Name of Model, Date, Version Number Dynamic Watershed Simulation Model (DWSM) 2002
More informationChapter 6. Hydrology. 6.0 Introduction. 6.1 Design Rainfall
6.0 Introduction This chapter summarizes methodology for determining rainfall and runoff information for the design of stormwater management facilities in the City. The methodology is based on the procedures
More informationModule 3. Lecture 4: Introduction to unit hydrograph
Lecture 4: Introduction to unit hydrograph (UH) The unit hydrograph is the unit pulse response function of a linear hydrologic system. First proposed by Sherman (1932), the unit hydrograph (originally
More information6.0 Runoff. 6.1 Introduction. 6.2 Flood Control Design Runoff
October 2003, Revised February 2005 Chapter 6.0, Runoff Page 1 6.1 Introduction 6.0 Runoff The timing, peak rates of discharge, and volume of stormwater runoff are the primary considerations in the design
More informationTable of Contents. Overview... 1
Chapter 3 Chapter 3 Table of Contents Overview... 1 Rainfall... 2 3-2-1 Rainfall Depths and Intensities... 2 3-2-2 Design Storm Distribution for Colorado Urban Hydrograph Procedure (CUHP)... 5 3-2-3 Temporal
More informationSection 600 Runoff Table of Contents
Section 600 Runoff Table of Contents 601 INTRODUCTION...600-1 602 RATIONAL METHOD...600-1 602.1 Rational Method Formula...600-2 602.2 Time of Concentration...600-2 602.3 Intensity...600-4 602.4 Runoff
More informationINFLOW DESIGN FLOOD CONTROL SYSTEM PLAN PLANT GREENE COUNTY ASH POND ALABMA POWER COMPANY
INFLOW DESIGN FLOOD CONTROL SYSTEM PLAN PLANT GREENE COUNTY ASH POND ALABMA POWER COMPANY Section 257.82 of EPA s regulations requires the owner or operator of an existing or new CCR surface impoundment
More informationChapter 6 Hydrology TABLE OF CONTENTS CHAPTER 6 - HYDROLOGY
Chapter 6 Hydrology TABLE OF CONTENTS CHAPTER 6 - HYDROLOGY... 6-1 6.1 Introduction... 6-1 6.1.1 Objective... 6-1 6.1.2 Definition... 6-1 6.1.3 Factors Affecting Floods... 6-1 6.1.4 Sources of Information...
More informationSTORMWATER MANAGEMENT: Emerging Planning Approaches and Control Technologies
STORMWATER MANAGEMENT: Emerging Planning Approaches and Control Technologies Chapter 5 " HYDROLOGIC SYSTEMS " CHAPTER 5 5.1 INTRODUCTION 5.1.1 Training Objectives The objectives of this module are:! to
More informationDRAINAGE & DESIGN OF DRAINAGE SYSTEM
Drainage on Highways DRAINAGE & DESIGN OF DRAINAGE SYSTEM P. R.D. Fernando Chartered Engineer B.Sc.(Hons), M.Eng. C.Eng., MIE(SL) Drainage Requirement of Highway Drainage System Introduction Drainage means
More informationEngineering Hydrology. Class 16: Direct Runoff (DRO) and Unit Hydrographs
Engineering Hydrology Class 16: and s Topics and Goals: 1. Calculate volume of DRO from a hydrograph; 2. Complete all steps to develop a. Class 14: s? HG? Develop Ocean Class 14: s? HG? Develop Timing
More informationHYDROLOGIC & HYDRAULIC ASPECTS of the Walnut Street Bridge over the Schuylkill River Philadelphia, PA
HYDROLOGIC & HYDRAULIC ASPECTS of the Walnut Street Bridge over the Schuylkill River Philadelphia, PA J. Richard Weggel CAEE201 Lectures 30 April & 2 May 2007 HYDROLOGY (Natural Science) Study of the waters
More informationEngineering Hydrology Class 3
Engineering Hydrology Class 3 Topics and Goals: I.Develop s (estimate precipitation) II.Develop simple constant intensity design storm III.Develop SCS design storm Ocean s Why do we want to derive the?
More informationPeak discharge computation
Ia/P 4 Peak Dischage Method Graphical Peak Discharge Method This chapter presents the Graphical Peak Discharge method for computing peak discharge from rural and urban areas. The Graphical method was developed
More informationIBS Site Drainage: Senior Design Project
IBS Site Drainage: Senior Design Project Len Wright, Ph.D., PE Lecturer, CEAE Wright.Len@gmail.com September 11, 2008 mwsw204i1.ppt/1 OUTLINE Motivation for Stormwater Management Quantity (both onsite,
More informationRunoff Hydrographs. The Unit Hydrograph Approach
Runoff Hydrographs The Unit Hydrograph Approach Announcements HW#6 assigned Storm Water Hydrographs Graphically represent runoff rates vs. time Peak runoff rates Volume of runoff Measured hydrographs are
More informationHYDROLOGIC CONSIDERATIONS. 22 nd Annual Nonpoint Source Pollution Conference Saratoga Springs, NY
LOW IMPACT DEVELOPMENT HYDROLOGIC CONSIDERATIONS 22 nd Annual Nonpoint Source Pollution Conference Saratoga Springs, NY May 18, 2011 PRESENTATION AGENDA Introduction Definitions Discuss Impacts to Hydrologic
More informationActivity Calculating Property Drainage
Page 1 of 5 Activity 2.3.11 Calculating Property Drainage Introduction When a property is developed, it is important to understand that changes to watershed characteristics (i.e., land use, slope, soil
More informationChapter H. Introduction to Surface Water Hydrology and Drainage for Engineering Purposes
Chapter H. Introduction to Surface Water Hydrology and Drainage for Engineering Purposes As seen in Figure H.1, hydrology is a complex science that deals with the movement of water between various stages
More informationINFLOW DESIGN FLOOD CONTROL SYSTEM PLAN PLANT BARRY ASH POND ALABAMA POWER COMPANY
INFLOW DESIGN FLOOD CONTROL SYSTEM PLAN PLANT BARRY ASH POND ALABAMA POWER COMPANY Section 257.82 of EPA s regulations requires the owner or operator of an existing or new CCR surface impoundment or any
More informationDRAINAGE CRITERIA MANUAL (V. 1) RUNOFF
Section CONTENTS Page RO- 1.0 OVERVIEW... 1 2.0 RATIONAL METHOD... 3 2.1 Rational Formula... 3 2.2 Assumptions... 4 2.3 Limitations... 4 2.4 Time of Concentration... 5 2.4.1 Initial Flow Time... 5 2.4.2
More informationCLARK COUNTY REGIONAL FLOOD CONTROL DISTRICT HYDROLOGIC CRITERIA AND DRAINAGE DESIGN MANUAL
CLARK COUNTY REGIONAL FLOOD CONTROL DISTRICT HYDROLOGIC CRITERIA AND DRAINAGE DESIGN MANUAL SECTION 600 STORM RUNOFF TABLE OF CONTENTS 601 INTRODUCTION 603 601.1 - Basin Characteristics 603 602 TIME OF
More informationHydrology and Water Management. Dr. Mujahid Khan, UET Peshawar
Hydrology and Water Management Dr. Mujahid Khan, UET Peshawar Course Outline Hydrologic Cycle and its Processes Water Balance Approach Estimation and Analysis of Precipitation Data Infiltration and Runoff
More information5/11/2007. WinTR-55 for Plan Reviews Small Watershed Hydrology Overview
WinTR-55 for Plan Reviews Small Watershed Hydrology Overview 1 Overview Course Outline Historical Background Program Description Model Capabilities and Limitations This is the Overview portion of the training.
More informationDIVISION 5 STORM DRAINAGE CRITERIA
DIVISION 5 STORM DRAINAGE CRITERIA Section 5.01 GENERAL The following storm drainage design criteria shall apply to all storm drainage designs in the City. Additional design criteria are specified in the
More information1. Stream Network. The most common approach to quantitatively describing stream networks was postulated by Strahler (1952).
1. Stream Network The most common approach to quantitatively describing stream networks was postulated by Strahler (1952). First Order Streams streams with no tributaries. Second Order Streams begin at
More informationStorm Sewer Design. Bob Pitt University of Alabama and Shirley Clark Penn State Harrisburg
Storm Sewer Design Bob Pitt University of Alabama and Shirley Clark Penn State Harrisburg Major floods are dramatic and water flow routes must be recognized when minor drainage systems fail. These types
More information4.1 General Methodology and Data Base Development
Chapter 4 METHODOLOGY 4.1 General and Data Base Development This report project utilized several computer software models and analysis techniques to create the numeric data on which decisions for this
More informationModelling Climate Change and Urbanization Impacts on Urban Stormwater and Adaptation Capacity
9th International Conference on Urban Drainage Modelling, Belgrade 2012 C4. Climate change impacts, pp.287-288 Modelling Climate Change and Urbanization Impacts on Urban Stormwater and Adaptation Capacity
More informationWMS Tools For Computing Hydrologic Modeling Parameters
WMS Tools For Computing Hydrologic Modeling Parameters Lesson 9 9-1 Objectives Use the drainage coverage as a basis for geometric parameters as well as overlaying coverages to compute important hydrologic
More informationFlood hazard assessment in the Raval District of Barcelona using a 1D/2D coupled model
9 th International Conference on Urban Drainage Modelling Belgrade 2012 Flood hazard assessment in the Raval District of Barcelona using a 1D/2D coupled model Beniamino Russo, David Suñer, Marc Velasco,
More informationLa Riereta Catchment Sant Boi de Llobregat
La Riereta Catchment Sant Boi de Llobregat Final Report Team 2 Enrique Amaya (COL) Lilian Yamamoto (BRA) Martín Pez (ARG) Sergio Esquivel (MEX) Instructor: José Macor Summary Contents 1. Introduction...
More informationHYDROLOGIC-HYDRAULIC STUDY ISABELLA OCEAN RESIDENCES ISLA VERDE, CAROLINA, PR
HYDROLOGIC-HYDRAULIC STUDY ISABELLA OCEAN RESIDENCES ISLA VERDE, CAROLINA, PR 1 INTRODUCTION 1.1 Project Description and Location Isabella Ocean Residences is a residential development to be constructed
More informationTECHNICAL BULLETIN. Synthetic Turf Athletic Field Drainage Design Assistance
TECHNICAL BULLETIN Synthetic Turf Athletic Field Drainage Design Assistance The SportsEdge HQ geocomposite strip drain products are engineered specifically for use in synthetic turf athletic field base
More informationCulvert Sizing procedures for the 100-Year Peak Flow
CULVERT SIZING PROCEDURES FOR THE 100-YEAR PEAK FLOW 343 APPENDIX A: Culvert Sizing procedures for the 100-Year Peak Flow A. INTRODUCTION Several methods have been developed for estimating the peak flood
More informationUrban Drainage Introduction. A.Ramachandra Rao. C.B. Burke. T.T. Burke, Jr.
32 Urban Drainage A.Ramachandra Rao Purdue University C.B. Burke Christopher B. Burke Engineering, Ltd. T.T. Burke, Jr. Christopher B. Burke Engineering, Ltd. 32.1 Introduction 32.2 The Rational Method
More informationChapter 3 Calculating the WQCV and Volume Reduction
Contents 1.0 Introduction... 1 2.0 Hydrologic Basis of the WQCV... 1 2.1 Development of the WQCV... 1 2.2 Optimizing the Capture Volume... 3 2.3 Attenuation of the WQCV (BMP Drain Time)... 4 2.4 Excess
More informationHYDROLOGIC MODELING CONSISTENCY AND SENSITIVITY TO WATERSHED SIZE
HYDROLOGIC MODELING CONSISTENCY AND SENSITIVITY TO WATERSHED SIZE by James C.Y. Guo. Professor, Civil Engineering, U. Of Colorado at Denver, James.Guo@cudenver.edu.. And Eric Hsu, Project Engineer, Parson
More informationSunset Circle Vegetated Swale and Infiltration Basin System Monitoring Report: Rainy Seasons and
Sunset Circle Vegetated Swale and Infiltration asin System Monitoring Report: Rainy Seasons 2012-13 and 2013-14 bstract Site Summary Project Features Sunset Circle Vegetated swales and infiltration basins
More informationHydrology Study. For Bella Terrazza Portion of Lot 1, Block 39, Subdivision of S Tract, Rancho El Cajon El Cajon, CA 92021
Hydrology Study For Bella Terrazza Portion of Lot 1, Block 39, Subdivision of S Tract, Rancho El Cajon El Cajon, CA 92021 Prepared for Daryl Priest - Priest Development Corporation 124 West Main Street,
More informationSEWAGE TREATMENT AND DISPOSAL
SEWAGE TREATMENT AND DISPOSAL QUANTITY OF SANITARY SEWAGE AND STORM WATER Zerihun Alemayehu Unpolluted cooling water Intercept or sewer Sources of Sewage Residential and commercial sewage Industrial wastewater
More information1 n. Flow direction Raster DEM. Spatial analyst slope DEM (%) slope DEM / 100 (actual slope) Flow accumulation
1 v= R S n 2/3 1/2 DEM Flow direction Raster Spatial analyst slope DEM (%) Flow accumulation slope DEM / 100 (actual slope) 0 = no cell contributing 215 = 215 cell contributing towards that cell sqrt (actual
More informationHydrologic Study Report for Single Lot Detention Basin Analysis
Hydrologic Study Report for Single Lot Detention Basin Analysis Prepared for: City of Vista, California August 18, 2006 Tory R. Walker, R.C.E. 45005 President W.O. 116-01 01/23/2007 Table of Contents Page
More informationGreen Infrastructure Flood Reduction Computations
Green Infrastructure Flood Reduction Computations Stephen Sands, PE, CFM ssands@hazenandsawyer.com March 24, 2016 Water JAM 2010 Discussion Topics Siting success Watershed-wide computations Individual
More informationPreliminary Drainage Analysis
Preliminary Drainage Analysis Tanimura and Antle Employee Housing Town of Spreckels County of Monterey, California LIB150205 May 29, 2015 Prepared For: Tanimura and Antle Produce Prepared By: 9699 Blue
More informationProject Drainage Report
Design Manual Chapter 2 - Stormwater 2A - General Information 2A-4 Project Drainage Report A. Purpose The purpose of the project drainage report is to identify and propose specific solutions to stormwater
More informationSummary of Detention Pond Calculation Canyon Estates American Canyon, California
July 15, 2015 Bellecci & Associates, Inc Summary of Detention Pond Calculation Canyon Estates American Canyon, California 1. Methodology: Method: Unit Hydrograph Software: Bentley Pond Pack Version 8i
More informationCEE3430 Engineering Hydrology
CEE3430 Engineering Hydrology Practice Exam (There are multiple practice questions here A 110 min test will likely not have more than four questions) 1. Water Balance Write the water balance as Δ Where
More informationLearning objectives. Upon successful completion of this lecture, the participants will be able to:
Solomon Seyoum Learning objectives Upon successful completion of this lecture, the participants will be able to: Describe and perform the required step for designing sewer system networks Outline Design
More informationSizing Criteria Worksheets and Examples
Appendix B Sizing Criteria Worksheets and Examples This Appendix provides sizing criteria worksheets and examples to illustrate the correct procedures for determining the water quality design flow and
More informationPre-Treatment Bioretention Cells Bioswales IOWA STORMWATER MANAGEMENT MANUAL DECEMBER 16, 2015
Pre-Treatment Bioretention Cells Bioswales IOWA STORMWATER MANAGEMENT MANUAL DECEMBER 16, 2015 Urban Runoff Background How we got here What Problem?? Provenance of the Problem Unified Sizing Criteria What
More informationINFLOW DESIGN FLOOD CONTROL SYSTEM PLAN 40 C.F.R. PART PLANT YATES ASH POND 3 (AP-3) GEORGIA POWER COMPANY
INFLOW DESIGN FLOOD CONTROL SYSTEM PLAN 40 C.F.R. PART 257.82 PLANT YATES ASH POND 3 (AP-3) GEORGIA POWER COMPANY EPA s Disposal of Coal Combustion Residuals from Electric Utilities Final Rule (40 C.F.R.
More informationJournal of Geography and Earth Science 1(1); June 2013 pp Idowu, Edan & Damuya
Estimation of the Quantity of Surface Runoff to Determine Appropriate Location and Size of Drainage Structures in Jimeta Metropolis, Adamawa State, Nigeria Idowu, T. O. Edan, J. D. Department of Surveying
More informationPRELIMINARY DRAINAGE REPORT NEWCASTLE FIRE STATION OLD STATE HIGHWAY
PRELIMINARY DRAINAGE REPORT FOR THE NEWCASTLE FIRE STATION OLD STATE HIGHWAY PREPARED FOR THE NEWCASTLE FIRE PROTECTION DISTRICT JULY 2014 BY ROSEVILLE DESIGN GROUP, INC. ROSEVILLE DESIGN GROUP, Inc Established
More informationUNIT HYDROGRAPH AND EFFECTIVE RAINFALL S INFLUENCE OVER THE STORM RUNOFF HYDROGRAPH
UNIT HYDROGRAPH AND EFFECTIVE RAINFALL S INFLUENCE OVER THE STORM RUNOFF HYDROGRAPH INTRODUCTION Water is a common chemical substance essential for the existence of life and exhibits many notable and unique
More informationTECHNICAL MEMORANDUM. SUBJECT: Determination of watershed historic peak flow rates as the basis for detention basin design
TECHNICAL MEMORANDUM FROM: Ken MacKenzie and Ryan Taylor SUBJECT: Determination of watershed historic peak flow rates as the basis for detention basin design DATE: June 7, 2012 The purpose of this memorandum
More informationAnalysis of Runoff Reduction and Hydrologic Cycle Utilizing LID Concepts
Maine Stormwater Conference (Portland, ME, 2015) Analysis of Runoff Reduction and Hydrologic Cycle Utilizing LID Concepts Park Jongpyo, Lee Kyoungdo: HECOREA. INC Shin Hyunsuk: Busan National University
More informationAPPENDIX A: STORMWATER HYDROLOGY
APPENDIX A: STORMWATER HYDROLOGY In low impact development (LID), the objective of stormwater control measures (SCMs) is to mimic or replicate the hydrologic function of a natural system. This approach
More informationRisk management of urban rain events in a coastal city. The case of Marseille
Risk management of urban rain events in a coastal city The case of Marseille Jean Claude GONDART General Secretary of the municipality of Marseille Dominique LAPLACE Manager engineering department SERAM
More informationINFLOW DESIGN FLOOD CONTROL SYSTEM PLAN 40 C.F.R. PART PLANT DANIEL ASH POND B MISSISSIPPI POWER COMPANY
INFLOW DESIGN FLOOD CONTROL SYSTEM PLAN 40 C.F.R. PART 257.82 PLANT DANIEL ASH POND B MISSISSIPPI POWER COMPANY EPA s Disposal of Coal Combustion Residuals from Electric Utilities Final Rule (40 C.F.R.
More information2
1 2 3 4 5 6 The program is designed for surface water hydrology simulation. It includes components for representing precipitation, evaporation, and snowmelt; the atmospheric conditions over a watershed.
More informationSimple Method for Estimating Phosphorus Export
Appendix L Simple Method for Estimating Phosphorus Export 1. The Simple Method The Simple Method is a technique used for estimating storm pollutant export delivered from urban development sites. The method
More informationStream Reaches and Hydrologic Units
Chapter United States 6 Department of Agriculture Natural Resources Conservation Service Chapter 6 Stream Reaches and Hydrologic Units Rain clouds Cloud formation Precipitation Surface runoff Evaporation
More informationRainfall - runoff: Unit Hydrograph. Manuel Gómez Valentín E.T.S. Ing. Caminos, Canales y Puertos de Barcelona
Rainfall - runoff: Unit Hydrograph Manuel Gómez Valentín E.T.S. ng. Caminos, Canales y Puertos de Barcelona Options in many commercial codes,, HMS and others HMS Menu Transform method, User specified,
More informationRAIN WATER HARVESTING FOR URBAN FLOOD PEAK REDUCTION
RAIN WATER HARVESTING FOR URBAN FLOOD PEAK REDUCTION Dr. A.K.Sarma, IIT Guwahati, India M. D. Baishya, Engineering Student, NERIST, India G. Giraud, Engineering Student, ENGEES, France 2005 INTRODUCTION
More informationHYDROLOGY STUDY PREPARED FOR: MARKHAM PERRIS LLC 302 WEST FIFTH STREET, SUITE 103 SAN PEDRO, CA (310) FOR THE PROJECT:
HYDROLOGY STUDY PREPARED FOR: MARKHAM PERRIS LLC 302 WEST FIFTH STREET, SUITE 103 SAN PEDRO, CA 90731 (310) 241-2992 FOR THE PROJECT: PERRIS VALLEY COMMERCE CENTER BUILDING PERRIS, CALIFORNIA PROJECT NUMBER:
More informationRunoff Processes. Daene C. McKinney
CE 374 K Hydrology Runoff Processes Daene C. McKinney Watershed Watershed Area draining to a stream Streamflow generated by water entering surface channels Affected by Physical, vegetative, and climatic
More informationIndex. Page numbers followed by f indicate figures.
Index Aerodynamic method, 103, 110 111 Algae, 131, 173, 175 Alternate depth, 88 Alternating block method, 132, 140 141 Attenuation, 106, 107f, 118, 120 Page numbers followed by f indicate figures. Baseflow
More informationEffect of Land Surface on Runoff Generation
Effect of Land Surface on Runoff Generation Context: Hydrologic Cycle Runoff vs Infiltration Infiltration: Process by which water on the ground surface enters the soil Runoff: Water (from rain, snowmelt,
More informationPRELIMINARY HYDROLOGY STUDY
PRELIMINARY HYDROLOGY STUDY FOR Tentative Tract Map West Side of Loma Alta Drive City of Oceanside, CA Prepared For: EMERALD HILLS LLC 4272 Dogwood Avenue Seal Beach, CA 90740 Contact: Mr. Jimmy Chen Ph:
More informationAppendix I OFFICE OF THE MORGAN COUNTY SURVEYOR STORMWATER DESIGN MANUAL 7/1/2008
Appendix I OFFICE OF THE MORGAN COUNTY SURVEYOR This Page Left Intentionally Blank OFFICE OF THE MORGAN COUNTY SURVEYOR APPENDIX I PAGE 1 Appendix II OFFICE OF THE MORGAN COUNTY SURVEYOR This Page Left
More informationHydrology is the study of the movement
G3691-2 The Wisconsin Storm Water M A N U A L Numerous methods are used to predict runoff peaks and volumes and routing flows (See for example Pitt, 1989; USDA- SCS, 1986; Walker, 1990). Two commonly used
More informationTreatment Volume: Curve Numbers. Composite CN or Not? Treatment Volume: Curve Numbers. Treatment Volume: Calculation. Treatment Volume: Calculation
Stormwater Engineering Bioretention Design Bill Hunt, PE, Ph.D. Extension Specialist & Assistant Professor NCSU-BAE www.bae.ncsu.edu/stormwater Bioretention Design Six Step Process 1 Determine Volume to
More informationPART 3 - STANDARDS FOR SEWERAGE FACILITIES DESIGN OF STORM SEWERS
PART 3 - STANDARDS FOR SEWERAGE FACILITIES 3.3 - DESIGN OF STORM SEWERS 3.301 Design of Storm Sewers A. General Information B. Investigations and Surveys C. Special Projects 3.302 Design Criteria for Storm
More informationSoftware Applications for Runoff Hydrological Assessment
Bulletin UASVM Horticulture, 67(2)/2010 Print ISSN 1843-5254; Electronic ISSN 1843-5394 Software Applications for Runoff Hydrological Assessment Severin CAZANESCU 1), Sorin CIMPEANU 1), Oana GUI 2), Dana
More informationCONSISTENCY BETWEEN CUHP AND RATIONAL METHODS James C.Y. Guo, PhD, P.E., and Ben Urbonas, P.E., D.WRD 08/04/2008
CONSISTENCY BETWEEN CUHP AND RATIONAL METHODS James C.Y. Guo, PhD, P.E., and Ben Urbonas, P.E., D.WRD 08/04/2008 When estimating runoff for a storm event it is assumed that the storm runoff occurs from
More informationSizing Calculations and Design Considerations for LID Treatment Measures
SCVURPPP C.3 Workshop December 18, 2012 Sizing Calculations and Design Considerations for LID Treatment Measures Jill Bicknell, P.E., EOA, Inc. Santa Clara Valley Urban Runoff Pollution Prevention Program
More informationAppendix G Preliminary Hydrology Study
Appendix G Preliminary Hydrology Study Preliminary Hydrology Study VESTING TTM 72608 Long Beach, CA Prepared for: The Long Beach Project, LLC 888 San Clemente, Suite 100 New Port Beach, CA May 28, 2014
More informationSTORM WATER MANAGEMENT REPORT
Silvercreek Junction STORM WATER MANAGEMENT REPORT Howitt Creek at the Silvercreek Parkway Site Guelph, Ontario August, 2008 TSH File 22304A-04 August 19, 2008 STORMWATER MANAGEMENT REPORT Howitt Creek
More informationDRAINAGE DESIGN AND RUTTING PERFORMANACE GUIDELINES FOR PERMEABLE PAVEMENT
DRAINAGE DESIGN AND RUTTING PERFORMANACE GUIDELINES FOR PERMEABLE PAVEMENT by Su Ling Cao Daryl Poduska Graduate Assistants Dan G. Zollinger Associate Professor Sponsored by The Uni-Group U.S.A. The Department
More informationAPPENDIX G HYDRAULIC GRADE LINE
Storm Drainage 13-G-1 APPENDIX G HYDRAULIC GRADE LINE 1.0 Introduction The hydraulic grade line is used to aid the designer in determining the acceptability of a proposed or evaluation of an existing storm
More informationGwinnett County Stormwater System Assessment Program
Gwinnett County Stormwater System Assessment Program Jonathan Semerjian, PE Dept. of Water Resources Stormwater Management Sam Fleming, PE Dewberry Presentation Overview Project Background Drivers Enhanced
More informationEFFECT OF RAINGAGE DENSITY ON RUNOFF SIMULATION MODELING by ABSTRACT
EFFECT OF RAINGAGE DENSITY ON RUNOFF SIMULATION MODELING by Ben Urbonas, P.E., D.WRE 1, Michael Paul Jansekok 2, James C.Y. Guo, PhD, P.E. 3 ABSTRACT Rainfall and runoff data for a 3.08 square mile urban
More informationUncertainty in Hydrologic Modelling for PMF Estimation
Uncertainty in Hydrologic Modelling for PMF Estimation Introduction Estimation of the Probable Maximum Flood (PMF) has become a core component of the hydrotechnical design of dam structures 1. There is
More informationHYDROLOGICAL INVESTIGATIONS IN SEMI-ARID AREAS CASE STUDY: RAILWAY CULVERT DESIGN IN LIBYA
Ninth International Water Technology Conference, IWTC9 2005, Sharm El-Sheikh, Egypt 1027 YDROLOGICAL INVESTIGATIONS IN SEMI-ARID AREAS CASE STUDY: RAILWAY CULVERT DESIGN IN LIBYA S. A. Serrag 1, A. M.
More informationRunoff Volume: The Importance of Land Cover
Runoff Volume: The Importance of Land Cover Grade Level: 9-12 Time: 1-2 class periods Learning Objectives: - Quantify the volume of water that runs off different land uses in a watershed. - Analyze the
More informationSection 2: Watershed Characteristics and Runoff
Section 2: Watershed Characteristics and Runoff The hydrology of the Wissahickon Creek and its tributaries varies greatly from place to place within the larger watershed. Stormwater management planning
More informationChapter 2 - Hydrologic Analysis
Chapter - Hydrologic Analysis The broad definition of hydrology is the science which studies the source, properties, distribution, and laws of water as it moves through its closed cycle on the earth (the
More informationStormwater Drainage Criteria Manual. City Of Clearwater Engineering Department Effective July 1, 2015
Stormwater Drainage Criteria Manual City Of Clearwater Engineering Department Effective July 1, 2015 Engineering Department STORMWATER DRAINAGE CRITERIA MANUAL Table of Contents STORMWATER DRAINAGE CRITERIA
More informationHydrology Study. Ascension Heights Subdivision Ascension Drive at Bel Aire Road San Mateo, California (Unincorporated)
Hydrology Study Ascension Heights Subdivision Ascension Drive at Bel Aire Road San Mateo, California (Unincorporated) Prepared for San Mateo Real Estate & Construction March 9, 21 Rev. 1 11-8-211 Rev.
More informationvisual otthymo version 2.0
2 visual otthymo version 2.0 R E F E R E N C E M A N U A L Visual OTTHYMO v2.0 Reference Manual July 2002 Table of Contents PROGRAM REFERENCE...1 INTRODUCTION...1 VISUAL OTTHYMO FILES...1 Project Files...1
More informationCity of Oakland. Public Works Agency Standards STORM DRAINAGE DESIGN GUIDELINES. Engineering Design & ROW Management Division
City of Oakland PUBLIC WORKS AGENCY 250 FRANK H. OGAWA PLAZA 4 TH FLOOR OAKLAND, CALIFORNIA 94612 (510) 238-3437 FAX (510) 238-7227 TTD (510) 238-3254 Public Works Agency Standards STORM DRAINAGE DESIGN
More information