Prepared for: City of Jeffersonville. November Prepared by

Transcription

1 JEFFERSONVILLE STORMWATER MASTER PLAN HYDRAULICS APPENDIX JEFFERSONVILLE, INDIANA Prepared for: City of Jeffersonville November 2011 Prepared by Christopher B. Burke Engineering, Ltd. 115 W. Washington St., Suite 1368-South Indianapolis, Indiana CBBEL Project Number

2 November 2011 Jeffersonville Stormwater Master Plan Hydraulics Appendix TABLE OF CONTENTS Page LIST OF TABLES... ii LIST OF EXHIBITS... ii LIST OF APPENDICES... ii 1.0 INTRODUCTION HYDRAULIC ANALYSIS INTRODUCTION HEC-RAS INPUT DATA Topographic Work Map Study Reach Flow Data Starting Water Surface Elevation Cross Section Geometric Data Manning's Roughness Coefficients Calibration Ineffective Flow and Blocked Obstructions Bridges Culverts Critical Depths Floodway LANCASSANGE CREEK FINAL RESULTS OF HYDRAULIC ANALYSIS REFERENCES... 6 Christopher B. Burke Engineering, Ltd. i

3 November 2011 Jeffersonville Stormwater Master Plan Hydraulics Appendix LIST OF TABLES Page 1. Peak Discharges Used in Model... 3 LIST OF EXHIBITS 1. Lick Run Topographic Workmap 2. Lick Run Tributary 4 Topographic Workmap 3. Lick Run Trib 1 Topographic Workmap 4. Lancassange Creek Topographic Workmap 5. Lentzier Creek Topographic Workmap 6. Battle Creek Topographic Workmap 7. Jenny Lind Run Topographic Workmap LIST OF APPENDICES 1. Lick Run Coordinated Discharge Curve 2. Lancassange Creek Flood Profile 3. HEC-RAS Models Output Christopher B. Burke Engineering, Ltd. ii

4 November 2011 Jeffersonville Stormwater Master Plan Hydraulics Appendix 1.0 INTRODUCTION This report documents the results of a Christopher B. Burke Engineering, Ltd. (CBBEL) hydraulic analysis of reaches of seven streams in Jeffersonville, Clark County, Indiana. The analysis was completed to determine approximate base flood elevations for reaches of Lick Run, Lick Run Tributary 4, Lick Run Tributary 1, Lancassange Creek, Lentzier Creek, Battle Creek and Jenny Lind Run to determine any potential flooding areas along the streams. This analysis along with the Preliminary Flood Insurance Study (FIS) delineations provides floodplain limits for all stream reaches within Jeffersonville that have one square mile or over drainage area as determined by the Indiana Department of Natural Resources (IDNR). The study reaches are located throughout Jeffersonville as shown outlined in red in Figure 1. Figure 1: Study Reaches Christopher B. Burke Engineering, Ltd. 1

5 November 2011 Jeffersonville Stormwater Master Plan Hydraulics Appendix 2.0 HYDRAULIC ANALYSIS 2.1 INTRODUCTION This section of the report presents the modeling developed for the hydraulic analysis for the seven stream reaches. The modeling was completed in accordance with the Indiana Department of Natural Resources (IDNR) Modeling Guidelines for approximate studies. 2.2 HEC-RAS INPUT DATA The hydraulic analysis developed for this analysis was completed using the Army Corps of Engineers HEC-RAS computer program, version 4.1 for all the streams except Lancassange Creek, which is discussed in Section 2.3. The nature and source of information that was used to develop the model for the analysis of the streams is provided below Topographic Work Map CBBEL used the Jeffersonville 2-foot contour interval topography provided by the City of Jeffersonville in 2011, as the base map for Lick Run, Lick Run Tributary 4, Lick Run Tributary 1, and Lancassange Creek. The vertical datum for the mapping is NAVD CBBEL used the USGS 5-foot contour interval topography, dated 1993, as the base map for Lentzier Creek, Battle Creek, and Jenny Lind Run. The vertical datum for this mapping is NGVD A copy of the map, showing the location and orientation of cross sections used in the hydraulic modeling is provided as Exhibits 1-7 for each of the stream reaches Study Reaches The study reach for Lick Run starts at Cross Section from the detailed modeling created for the current Preliminary Flood Insurance Study (FIS) and continues upstream approximately 3.8 miles to approximately 1,060 feet downstream of Veteran s Parkway. The study reach for Lick Run Tributary 4 starts at the confluence with Lick Run and continues upstream approximately 0.76 miles. The study reach for Lick Run Tributary 1 starts at the confluence with Lick Run and continues upstream approximately 0.58 miles. The study reach for Lentzier Creek starts at Cross Section 4.72 from the detailed modeling for the preliminary FIS and continues upstream approximately 1.1 miles. The study reach for Battle Creek starts at the confluence with the Ohio River and continues upstream approximately 0.7 miles. The study reach for Jenny Lind Run starts at the confluence with the Ohio River and continues upstream approximately 0.4 miles. Christopher B. Burke Engineering, Ltd. 2

6 November 2011 Jeffersonville Stormwater Master Plan Hydraulics Appendix Flow Data Flow data for the simulation of the 100-year storm event for Lick Run was taken from the discharge at the upstream limit of the Preliminary FIS model mentioned in the previous section. Flow data for Lick Run Tributary 4 and Lick Run Tributary 1 were taken from the existing Lick Run Coordinated Discharge Graph, which is included in Appendix 1. Flow data for Lentzier Creek was taken from the discharge at the upstream limit of the Preliminary FIS model. Flow data for Battle Creek and Jenny Lind Run were taken from the CBBEL hydrologic analysis discussed in the Hydrologic Appendix. Table 1 summarizes the discharges used for each of the streams. Stream Table 1 Peak Discharges Used in the Hydraulic Models HEC-RAS Cross Section Reach Recurrence Interval (Year) 100 Peak Discharge (cfs) Lick Run Lick Run Tributary Lick Run Tributary Lentzier Creek Battle Creek Jenny Lind Run Starting Water Surface Elevation The starting water surface elevation for the 100-year storm event for Lick Run was taken from the water surface elevation at Cross Section in the Preliminary FIS model. The starting water surface elevation for Lick Run Tributary 4 was taken from the water surface elevation at Cross Section from the Preliminary FIS model of Lick Run. The starting water surface elevations form Lick Run Tributary 1, Lentzier Creek, Battle Creek, and Jenny Lind Run were calculated by using the slope-area method or normal depth Cross Section Geometric Data Cross-section geometric data was taken directly from the topographic base map described above. All cross sections were aligned to best represent a perpendicular orientation to flow. Christopher B. Burke Engineering, Ltd. 3

7 November 2011 Jeffersonville Stormwater Master Plan Hydraulics Appendix Manning's Roughness Coefficients Manning's roughness coefficients for Lick Run, Lick Run Tributary 4, and Lick Run Tributary 1 were taken from the Preliminary FIS modeling for the detailed study of Lick Run. Manning s roughness coefficients for Lick Run and Lick Run Tributary 4 are for the channel and for the overbanks. For Lick Run Tributary 1, they are 0.05 for the channel and 0.08 for the overbanks. The Manning s roughness coefficients for Lentzier Creek were taken from the downstream modeling for the stream in the Preliminary FIS. The Manning s roughness coefficients are 0.06 for the channel and 0.08 for the overbanks. The Manning s roughness coefficients for Battle Creek and Jenny Lind Run were taken from aerial photographs, and they are 0.05 for the channel and 0.08 for the overbanks Calibration No calibration was performed on the streams Ineffective Flow and Blocked Obstructions Ineffective flow limits were modeled for Lick Run Tributary 4 and Lick Run Tributary 1. The ineffective flow limits were used to reflect high ground not captured in the cross section data Bridges Since the modeling was approximate, existing bridges were not included in the model Culverts Since the modeling was approximate, existing culverts were not included in the model Critical Depths No critical depths were calculated for the 100-year profile Floodway No floodway analysis was performed on the streams. Christopher B. Burke Engineering, Ltd. 4

8 November 2011 Jeffersonville Stormwater Master Plan Hydraulics Appendix 2.3 LANCASSANGE CREEK Due to the short study reach of Lancassange Creek, a hydraulic model was not developed for this stream. The study reach for Lancassange Creek starts at the upstream limit of the FIS (Section O) and continues upstream for approximately 0.15 miles. The approximate 100-year water surface elevation for the additional study reach was determined based on the assumption that the depth of flow at the upstream end of the detailed study in the FIS would be applicable for the short additional reach studied for this analysis. Based on the Lancassange Creek Flood Profile Sheet 04P in the FIS, the depth of flow at the upstream limit was 10.2 feet. The Lancassange Creek Flood Profile from the FIS is included in Appendix 2. The 10.2 foot depth was added to the channel invert at each of the cross sections to determine the approximate water surface elevations for the current study reach. 2.4 FINAL RESULTS OF HYDRAULIC ANALYSIS Utilizing the input data described in Section 2.2, HEC-RAS existing condition models for the streams were developed. A copy of the model output for each stream is included as Appendix 3. A disk with digital copies of the models and the floodplain mapping shapefiles are provided as in the Hydraulics Appendix on the master CD provided for the Master Plan. Christopher B. Burke Engineering, Ltd. 5

9 November 2011 Jeffersonville Stormwater Master Plan Hydraulics Appendix 3.0 REFERENCES City of Jeffersonville, 2-foot contour interval topography, NAVD 1988 datum. USGS, 5-foot contour interval topography, NAVD 1988 datum, Dated Christopher B. Burke Engineering, Ltd. 6

10 November 2011 Jeffersonville Stormwater Master Plan Hydraulics Appendix APPENDIX 1 LICK RUN COORDINATED DISCHARGE CURVE Christopher B. Burke Engineering, Ltd.

11 Year Flood 2 Discharge (Cfs) MOUTH State of Indiana DEPARTMENT OF NATURAL RESOURCES Division of Water Coordinated Discharge Graph Lick Run CLARK COUNTY, IN Total Drainage Area (Square Miles) October 2005

12

13

14

15

16

17

18

19

20