Active Recharge Project for the Tributaries of the Santa Ana River, San Bernardino Valley, California
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Stormwater Flow and Capture Analysis ‐ Active Recharge Project for the Tributaries of the Santa Ana River, San Bernardino Valley, California DRAFT PREPARED FOR: San Bernardino Valley Municipal Water District January 10, 2012 GEOSCIENCE Support Services, Inc. Ground Water Resources Development P.O. Box 220, Claremont, CA 91711 | P (909) 451-6650 | F (909) 451-6638 | www.gssiwater.com Stormwater Flow and Capture Analysis ‐ Active Recharge Project for the Tributaries of the Santa Ana River, San Bernardino Valley, California 10‐Jan‐12 STORMWATER FLOW AND CAPTURE ANALYSIS ‐ ACTIVE RECHARGE PROJECT FOR THE TRIBUTARIES OF THE SANTA ANA RIVER, SAN BERNARDINO VALLEY, CALIFORNIA TABLE OF CONTENTS ABBREVIATIONS AND DEFINITIONS ........................................................................................................ 1 1.0 INTRODUCTION ............................................................................................................................ 7 2.1 Purpose and Scope .............................................................................................................. 7 2.2 Approved Modifications to Scope of Work ........................................................................... 8 2.3 Sources of Data ................................................................................................................... 9 3.0 QUANTIFICATION OF THE AMOUNT OF STORMWATER GENERATED BY EACH TRIBUTARY TO THE SANTA ANA RIVER (NOT INCLUDING THE SANTA ANA RIVER) LEAVING THE SBBA .................... 11 3.1 Quantification of Historical Stormwater Flows from Outside Tributaries to the SBBA ......... 11 3.2 Quantification of the Amount of Surface Flow that Leaves the SBBA .................................. 12 3.2.1 Watershed Model Development ........................................................................... 12 3.2.2 Watershed Model Calibration ............................................................................... 13 3.2.3 Watershed Model Verification............................................................................... 15 3.2.4 Watershed Model Sensitivity Analysis .................................................................... 16 3.2.5 Predictive Model Scenarios .................................................................................... 17 3.3 Quantification of the Amount of Surface Flow that Leaves the SBBA ...................... 18 3.4 Quantification of the Amount of Water Generated Internally within the SBBA ....... 19 4.0 CONCEPTUAL DESIGNS FOR FACILITIES THAT WILL BE USED TO MAXIMIZE THE CAPTURE OF STORMWATER BY EACH TRIBUTARY TO THE SANTA ANA RIVER (NOT INCLUDING THE SAR) LEAVING THE SBBA .................................................................................................................... 21 4.1 Documentary Research and Field Inventory of Existing Retention/Debris and Spreading Basins ............................................................................................................................... 21 i Stormwater Flow and Capture Analysis ‐ Active Recharge Project for the Tributaries of the Santa Ana River, San Bernardino Valley, California 10‐Jan‐12 4.2 Field Infiltrometer Tests of Selected Tributary Creeks (New and Existing Basin Areas) ....... 21 4.3 Existing Claims on Water from Tributary Creeks ................................................................ 23 4.4 New Facilities to Optimize Capture of Stormwater Including New Retention/Debris Basins, Expanded, and New Spreading Basins ............................................................................... 24 4.4.1 Selection of Potential On‐Stream Recharge Locations ............................................. 25 4.4.3 Conceptual Designs for Facilities That Will Be Used to Maximize Capture of Stormwater ............................................................................................................ 31 4.4.4 Engineers Estimate for Construction of Capture Facilities ....................................... 32 4.4.5 Proposed Physical and Operational Modifications to Maximize Stormwater Capture at Existing Facilities ................................................................................................ 33 4.4.6 Potential Modifications to Existing Detention Basins to Maximize Stormwater Capture ...................................................................................................................... 33 4.4.7 Potential Operational Changes to Existing Detention Basins to Maximize Stormwater Capture .................................................................................................................. 34 5.0 QUANTIFICATION OF THE AMOUNT OF STORMWATER GENERATED BY EACH TRIBUTARY TO THE SANTA ANA RIVER (NOT INCLUDING THE SAR) LEAVING THE SBBA, ASSUMING THAT CAPTURE AND USE HAS BEEN MAXIMIZED ................................................................................................ 36 5.1 Ground Water Percolation from Stormwater Capture ........................................................ 36 5.2 Results from Project Stormwater Capture (Scenario 5) ...................................................... 38 5.2.1 Net Ground Water Recharge Under Project Conditions .......................................... 38 5.2.2 Quantification of the Amount of Surface Flow that Leaves the SBBA Under Project Conditions .............................................................................................................. 38 6.0 SUMMARY OF FINDINGS ............................................................................................................ 40 6.1 Historical Stormwater Flows from Outside Tributaries to the SBBA ................................... 40 6.2 Quantification of the Amount of Surface Flow that Leaves the SBBA .................................. 40 6.3 Quantification of the Amount of Water Generated Internally within the SBBA .................. 42 ii Stormwater Flow and Capture Analysis ‐ Active Recharge Project for the Tributaries of the Santa Ana River, San Bernardino Valley, California 10‐Jan‐12 6.4 Field Infiltrometer Tests of Selected Tributary Creeks (New and Existing Basin areas) ........ 42 6.5 Potential New On‐Stream Recharge Facility Locations ....................................................... 43 6.6 Potential Project Capture Volumes from Tributary Creeks ............................................... 43 6.7 Proposed Physical and Operational Modifications to Maximize Stormwater Capture at Existing Facilities ............................................................................................................... 44 6.8 Ground Water Recharge from Stormwater Capture ........................................................... 45 6.9 Quantification of the Amount of Surface Flow that Leaves the SBBA under Project Conditions......................................................................................................................... 46 6.10 Estimate of Cost for Active Recharge Project ..................................................................... 47 7.0 REFERENCES ............................................................................................................................... 48 FIGURES, TABLES, APPENDICES iii Stormwater Flow and Capture Analysis ‐ Active Recharge Project for the Tributaries of the Santa Ana River, San Bernardino Valley, California 10‐Jan‐12 FIGURES No. Description 1 Project Location and Tributary Sub‐Watersheds 2 2005 Land Use Conditions in the SBBA 3 1963 Land Use Conditions in the SBBA 4 Hydrolologic Soil Types in the SBBA 5 Isohyetals Precipitation and Gaging Station Locations 6a Channel Lining and Debris Basins – pre‐1969 6b Channel Ling and Debris Basins ‐2005 Conditions 6c Retention Basin, Debris Basin, and Spreading Basin Locations 7 Annual Surface Flow at Lytle Creek near Fontana Gaging Station (11062001) – 1934 to 2008 8 Annual Surface Flow at Cajon Creek below Lone Pine Creek near Keenbrook Gaging Station (11063510) – 1934 to 2008 9 Annual Surface Flow at Devil Canyon Creek near San Bernardino Gaging Station (11063680) – 1934 to 2008 10 Annual Surface Flow at East Twin Creek near Arrowhead Springs Gaging Station (11058500) – 1934 to 2008 11 Annual Surface Flow at City Creek near Highland Gaging Station (11055801) – 1934 to 2008 12 Annual Surface Flow at Plunge Creek near East Highlands Gaging Station (11055501) – 1934 to 2008 13 Annual Surface Flow at Mill Creek near Yucaipa Gaging Station (11054001) – 1934 to 2008 14 Annual Surface Flow at San Timoteo near Redlands Gaging Station (11057000) – 1934 to 2008 15 Annual Surface Flow at Cable Creek – 1934 to 2008 16 Annual Surface Flow at Sand Canyon Creek – 1934 to 2008 17 Annual Surface Flow at Waterman Canyon Creek – 1934 to 2008 iv Stormwater Flow and Capture Analysis ‐ Active Recharge Project for the Tributaries of the Santa Ana River, San Bernardino Valley, California 10‐Jan‐12 FIGURES (CONT.) No. Description 18 Annual Total Surface Flow from Outside Tributaries (Not Including Santa Ana River) to SBBA – 1934 to 2008 19 Schematic Diagram of HSPF 20 HSPF Model Watershed Areas 21 Hydrograph of Measured and Model‐Simulated Daily Streamflow at Santa Ana River at E Street Gaging Station – 1998 to 2008 22 Hydrograph of Measured and Model‐Simulated Daily Streamflow at San Timoteo Creek near Loma Linda Gaging Station – 1998 to 2008 23 Hydrograph of Measured and Model‐Simulated Daily Streamflow at Lytle Creek at Colton Gaging Station – 1998 to 2008 24 Hydrograph of Measured and Model‐ Simulated Daily