SAWS WATER PROJECTS MODELING CRITERIA GUIDELINES

Transcription

1 SAWS WATER PROJECTS MODELING CRITERIA GUIDELINES July U.S. Highway 281 North San Antonio, Texas 78212

2 Modeling Criteria Guidelines, July 2016 TABLE OF CONTENTS MODELING CRITERIA GUIDELINES FOR SAWS WATER PROJECTS... 3 HYDRAULIC GRADE LINE REQUEST FORM... 3 DEVELOPER PROCESS FOR SUBMITTING A HYDRAULIC MODEL... 3 APPENDIX A - HYDRAULIC GRADE LEVEL MAP APPENDIX B - EXAMPLE OF HYDRAULIC MODEL INPUTS... 6 APPENDIX C - EXAMPLE OF HYDRAULIC MODEL OUTPUTS

3 Modeling Criteria Guidelines for SAWS Water Projects Modeling Criteria Guidelines, July 2016 Hydraulic Grade Line Request Form Date Project Name Location Map - must include boundary of development tract and proposed connection point to existing water main Location of Development - if an address cannot be provided, then the closest street intersection and intersection corner will need to be provided Engineer s contact name, company, phone number, fax number, mailing address and address EDU s by Pressure Zone Fire Flow 25 psi Type of Development: Commercial/Industrial, Residential/Apartment Comments Developer Process for Submitting a Hydraulic Model Obtain the Pressure Zone static gradient for the development (Appendix A) Provide Development Master Plan reflecting roads, development densities, pressure zone limits, development units and contours with labels Provide development unit schedule by years with estimated service requirements (EDU s) by development unit per year Provide information on fire flow requirements for each development unit, per COSA adopted Fire Code and Local amendments, and SAWS Development criteria Submit hydraulic model using the criteria stated in Chapter 9 of the Utility Service Regulations and identify the software version used for the hydraulic model Submit the following to SAWS for review: a. Master Water Plan Exhibit to show the following: Water pipe layout of the development Unit or sub-development boundary limits Road alignments All anticipated water easements Pressure Zone boundary line(s) Contours with labels Pipe size(s) and location Fire hydrant locations state if existing or proposed Connection point(s) to existing SAWS/District Special Project (DSP) water main All proposed water infrastructure required to serve the proposed development including, but not limited to; tanks, wells, pumps, etc. b. Hydraulic Model Input Data (Appendix B) associated with the above map shall include the following: Establish scenarios by unit(s), when applicable. Scenarios should include domestic demands and fire flow evaluations for all areas within each scenario. One scenario shall reflect completed development of all units at full build-out. Pipe diameter, pipe length, C factor Fire hydrant existing and proposed with elevation and demand value 3

4 Modeling Criteria Guidelines, July 2016 Junction ground elevation and demand value Connection point(s) to SAWS/DSP water line ground elevation and hydraulic grade line Tanks hydraulic grade line, volume, ground surface elevation, configuration (ground storage or elevated storage) Pumps design point (flow and total dynamic head) or a pump curve, ground surface elevations, firm and ultimate capacities Wells sustainable yield c. Hydraulic Model Output (Appendix C) associated with the above map shall be legible and include the following: Provide data result tables and graphic exhibits for each scenario Data Result/Output Tables Pipe domestic flow velocity and head loss for each scenario Fire hydrant residual pressure under fire flow conditions Junction pressure for domestic Connection Point(s) to SAWS/DSP water line pressure/hydraulic grade line for domestic Tanks fill/drain rate Pumps flow from each pump Exhibits to be provided for each scenario Pipe size, show labels, domestic flow direction and velocities Node show labels, domestic condition pressures, estimated fire flow values, identify node(s) with minimum pressure that control fire flows throughout the development piping network. Junction locations must include the lowest and highest ground elevations where the proposed pipe will be located. If the proposed pipe has a dead-end, then the length from previous junction to the end of pipe along with pipe diameter must be stated. Pumps, tanks, wells show labels, provide graphs of flow rates, water levels, etc. as part of the scenario summary Fire hydrants show label, estimated fire flow values for mains at those locations Model ID s shall be labeled on the exhibit and legible. Summary of findings d. Engineering Report shall include the following: A brief summary of the development A brief description of development schedule reflecting service requirements by year and by units Summary of scenario descriptions Summary of scenario modeling results Available fire flow based on existing and proposed infrastructure Provide recommendations, if any, for potential oversizing of mains or facilities Exhibits printed on sizes that are easily readable and clearly illustrate required output data and results (tables, etc.) for hydraulic model A CD with appropriate dwg, dgn, shp files as noted above, with the complete Master Water Plan included. 4

5 Appendix A - Hydraulic Gradient Level Map HGL (ft) PZ Max Ground Elev (ft) Min Ground Elev (ft) B A C, 950E, 950W , 5A C A W B D D Y , C Z F L D , 10A, 10B N X D T , 11A, 11M CTI S B, 11O E E, 11K B, 12SSH C , 12A F C A ") ") µ Created: July 2016

6 Appendix B - Example of Hydraulic Model Inputs Note: The following examples should be used more as a reference due to varying hydraulic modeling software having different layout styles for model inputs. Pipe: Junction:

7 Modeling Criteria Guidelines, July 2016 Appendix B (continued) Note: The following examples should be used more as a reference due to varying hydraulic modeling software having different layout styles for model inputs. Tank: Pump: Well: 7

8 Modeling Criteria Guidelines, July 2016 Appendix C - Example of Hydraulic Model Outputs Note: The following examples should be used more as a reference due to varying hydraulic modeling software having different layout styles for model outputs. Pipes: Junctions: 8