Analysis of Historical Data for the Joe Pool Lake Watershed Characterization Project
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Analysis of Historical Data for the Joe Pool Lake Watershed Characterization Project October 2019 On the cover: Looking downstream at a historical data collection site on Low Branch at the Holland Road crossing. Analysis of Historical Data for the Joe Pool Lake Watershed Characterization Project Funded by The Texas Commission on Environmental Quality (Contract No. 582-19-90205) Investigating Entities The Trinity River Authority of Texas Prepared by Aaron Hoff, Trinity River Authority Angela Kilpatrick, Trinity River Authority TR-1901 October 2019 Funding provided by the Texas Commission on Environmental Quality through a Clean Water Act § 319(h) grant from the U.S. Environmental Protection Agency. Analysis of Historical Data for the Joe Pool Lake Watershed Characterization Table of Contents List of Figures .............................................................................................................................................................. ii List of Tables .............................................................................................................................................................. iii List of Acronyms ........................................................................................................................................................ iv 1.0 Introduction ....................................................................................................................................................1 1.1 Project Overview and Objectives ...............................................................................................................1 1.2 Review of the Watershed and Impairments ..............................................................................................3 2.0 Data Inventory ................................................................................................................................................3 2.1 Geographic and Spatial Data ......................................................................................................................3 2.2 Other Studies and Reports .........................................................................................................................7 2.2.1 Joe Pool Lake Customer Reports ........................................................................................................8 2.2.2 E. coli in Sediments – CRP Special Report...........................................................................................8 2.2.3 CRP Biological Monitoring – Walnut Creek ........................................................................................8 3.0 Data Review Methods ....................................................................................................................................8 3.1 TCEQ Water Quality Standards ...................................................................................................................8 3.2 Nutrient Screening Levels and Reference Criteria .....................................................................................9 3.3 Description of Assessments ..................................................................................................................... 10 3.3.1 TCEQ 2016 Texas Integrated Report ............................................................................................... 10 3.3.2 TRA In-house Assessment ................................................................................................................ 10 3.3.3 TRA Joe Pool Lake Customer Water Quality Reports ...................................................................... 11 3.4 Data Collection ........................................................................................................................................ 11 3.5 Water Quality Trends .............................................................................................................................. 11 4.0 Watershed Characteristics .......................................................................................................................... 11 4.1 General Information ................................................................................................................................ 11 4.2 Climate ..................................................................................................................................................... 11 4.3 Geology .................................................................................................................................................... 11 4.4 Soils .......................................................................................................................................................... 12 4.5 Land Use and Land Cover ........................................................................................................................ 12 4.6 Ecology ..................................................................................................................................................... 15 5.0 Reservoir Characteristics ............................................................................................................................. 15 5.1 General Information ................................................................................................................................ 15 5.2 Hydraulics ................................................................................................................................................ 15 5.3 Water Quality Monitoring Data ............................................................................................................... 17 5.3.1 Aquatic Life Use Assessments ......................................................................................................... 19 i Analysis of Historical Data for the Joe Pool Lake Watershed Characterization 5.3.2 Contact Recreation Use Assessments ............................................................................................. 19 5.3.3 General Use Assessments ................................................................................................................ 19 5.3.4 Fish Consumption Use Assessments ............................................................................................... 19 5.3.5 Public Water Supply Use Assessments ............................................................................................ 20 6.0 Stream Characteristics ................................................................................................................................. 20 6.1 Flow ......................................................................................................................................................... 20 6.2 Water Quality Monitoring Data ............................................................................................................... 20 6.2.1 Aquatic Life Use Assessments ......................................................................................................... 20 6.2.2 Contact Recreation Use Assessments ............................................................................................. 20 6.2.3 General Use Assessments ................................................................................................................ 21 6.2.4 Fish Consumption Use Assessments ............................................................................................... 21 6.2.5 Public Water Supply Use Assessments ............................................................................................ 22 7.0 Trend Analysis.............................................................................................................................................. 22 7.1 Trends in Joe Pool Lake ........................................................................................................................... 22 7.2 Trends in Joe Pool Lake Tributaries ......................................................................................................... 26 8.0 Source Identification Analysis ..................................................................................................................... 26 8.1 Baseline Watershed Monitoring.............................................................................................................. 26 8.2 Flow and Load Duration Curves ............................................................................................................... 26 8.3 Load Calculation and Modeling Analyses ................................................................................................ 29 8.3.1 SELECT Pollutant Load Calculation Tool .......................................................................................... 29 8.3.2 SWAT Modeling Exercises ............................................................................................................... 30 9.0 Conclusions .................................................................................................................................................. 31 9.1 Joe Pool Lake (Segment 0838) ................................................................................................................. 31 9.2 Walnut Creek (Segment 0838C) .............................................................................................................. 32 10.0 References ..................................................................................................................................................