DOCSLIB.ORG

Effects of Regulation on L-Moments of Annual Peak Streamflow in Texas

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Effects of Regulation on L-Moments of Annual Peak Streamflow in Texas In cooperation with the Texas Department of Transportation Effects of Regulation on L-moments of Annual Peak Streamflow in Texas Water-Resources Investigations Report 01–4243 U.S. Department of the Interior U.S. Geological Survey Technical Report Documentation Page 2. Government Accession No. 3. Recipient's Catalog No. 1. Report No. 3301-12 4. Title and Subtitle 5. Report Date EFFECTS OF REGULATION ON L-MO MENTS OF ANNUAL PEAK May 2002 STREAMFLOW IN TEXAS 6. Performing Organization Code 7. Author(s) 8. Performing Organization Report No. William H. Asqu ith W RIR 01–4243 9. Performing Organization Name and Address 10. Work Unit No. (TRAIS) U.S. Geological Survey Water Resources Division 11. Contract or Grant No. 8027 Exchange Dr. Project 0–3301 Austin, TX 78754 12. Sponsoring Agency Name and Address 13. Type of Report and Period Covered Texas Department of Transportation U.S. Geological Survey Research from 1998 to 200 0 Research and Technology Implementation Office Water Resources Division 4000 Jackson Ave., Bldg. 1 8027 Exchange Dr. 14. Sponsoring Agency Code Austin, TX 78731 Austin, TX 78754 15. Supplementary Notes 16. Abstract Several techniques exist to estimate annual peak-streamflow frequency for streamflows that have recurrence intervals ranging from 2 to 500 years for natural (unregulated) drainage basins in Texas. Unfortunately, such techniques have limited applicability in regulated basins. There are numerous regulated basins throughout Texas, which has more than 7,000 dams that are identified by Texas Natural Resource Conservation Commission permits. The effects on annual peak stre amflow from reservoirs created by these d ams range from negligible to the complete suppression of the flood hydrograph; also, reservoirs can artificially create flood-like hydrographs. The large number of reservoirs and their widespread distribution in Texas necessitate an assessment of flood characteristics in regulated basins. Therefore, the U.S. Geological Survey, in cooperation with the Texas Department of Transportation, conducted a study of the effects of regulation on L-moments of annual peak streamflow in Texas. For this report, the State was divided into three regions. Four regression equations to estimate the L-moments of natural annual peak- streamflow data for ungaged sites were derived for each region from data for 367 streamflow-gaging stations in natural basins. The explanatory variables in the equations are contributing drainage area, basin shape factor, and stream slope. The effects of regulation on the L-moments of annual peak-streamflow data were determined by analysis of maximum and normal storage-capacity data from reservoirs for 96 streamflow-gaging stations in variously regulated basins. The results indicate that as potential flood storage (defined by the difference between total maximum and normal capacity) in a basin increases, the mean annual peak streamflow decreases nonlinearly. Evidence strongly indicates (despite contrary expectation) that the higher L-moments (coefficient of L-variation, L-skew, and L-kurtosis) are unaffected by regulation. 17. Key Words 18. Distribution Statement Surface water, Streamflow, Peak streamflow frequency, Flood- No restrictions. This document available to the public through the plain management, Flood risk, Hydraulic structure, Recurrence U.S. Geological Survey, Branch of Information Service s, Box interval, Gaged stream site, Ungaged stream s ite, Natural 25286, Denver CO 80225–0286 drainage basin, Regulated drainage basin, Reservoir, Texas 19. Security Classif. (of this report) 20. Security Classif. (of this page) 21. No. of Pages 22. Price Unclassified Unclassified 66 $4.00 Form DOT F 1700.7 (8-72) Reproduction of completed page authorized Cover: Medina Dam and Medina Lake, August 1994 (photograph by Ted A. Small, U.S. Geological Survey). U.S. Department of the Interior U.S. Geological Survey Effects of Regulation on L-moments of Annual Peak Streamflow in Texas By William H. Asquith U.S. GEOLOGICAL SURVEY Water-Resources Investigations Report 01–4243 In cooperation with the Texas Department of Transportation Austin, Texas 2001 U.S. DEPARTMENT OF THE INTERIOR Gale A. Norton, Secretary U.S. GEOLOGICAL SURVEY Charles G. Groat, Director Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. For additional information write to District Chief U.S. Geological Survey 8027 Exchange Dr. Austin, TX 78754–4733 E-mail: [email protected] Copies of this report can be purchased from U.S. Geological Survey Branch of Information Services Box 25286 Denver, CO 80225–0286 E-mail: [email protected] ii CONTENTS Abstract ................................................................................................................................................................................ 1 Introduction .......................................................................................................................................................................... 1 Purpose and Scope .................................................................................................................................................... 3 U.S. Geological Survey Streamflow Data ................................................................................................................ 3 Texas Natural Resource Conservation Commission Reservoir Data ........................................................................ 5 Approach .................................................................................................................................................................. 6 Study Methods ..................................................................................................................................................................... 7 Peak-Streamflow Frequency Analysis ...................................................................................................................... 7 Variables Representing Regulation ........................................................................................................................... 9 Comparison of Annual Peak Streamflow for Static Periods of Regulation .............................................................. 9 Analysis of Trends .................................................................................................................................................... 11 Effects of Regulation on L-moments of Annual Peak Streamflow ...................................................................................... 12 Estimating L-moments of Natural Annual Peak Streamflow ................................................................................... 12 Quantifying Regulation Effects on L-moments of Natural Annual Peak Streamflow ............................................. 13 Adjusting L-moments of Natural Annual Peak Streamflow for Potential Regulation Effects ................................. 18 Summary .............................................................................................................................................................................. 25 Selected References ............................................................................................................................................................. 26 PLATES (Plates are in pocket) 1–2. Maps showing: 1. Location of U.S. Geological Survey streamflow-gaging stations used in analysis 2. Location of dams in Texas Natural Resource Conservation Commission inventory of dams used in analysis FIGURES 1–2. Maps showing: 1. Location of 367 streamflow-gaging stations with at least 10 years of annual peak-streamflow data through 1997 (designated as natural by 10-percent criterion) ........................................................... 4 2. Location of 96 streamflow-gaging stations with at least 10 years of annual peak-streamflow data through 1997 (designated as regulated by 10-percent criterion) that have static periods of regulation suitable for comparative analysis .............................................................................................. 5 3–13. Graphs showing: 3. Example of time series of cumulative changes in regulation for station 08136500 Concho River at Paint Rock, Texas ................................................................................................................................... 10 4. Relation between (a) change in maximum capacity, (b) change in normal capacity, and (c) change in difference between maximum and normal capacity to contributing drainage area in all regions ......... 14 5. Relation between (a) change in maximum capacity, (b) change in normal capacity, and (c) change in difference between maximum and normal capacity to contributing drainage area in northeast region ......................................................................................................................................................... 15 6. Relation between (a) change in maximum capacity, (b) change in normal capacity, and (c) change in difference between maximum and normal capacity to contributing drainage area in southeast region ......................................................................................................................................................... 16 7. Relation between (a) change in maximum capacity, (b) change in normal capacity, and (c) change in difference between maximum and normal capacity to contributing drainage
Load more

Recommended publications
  • Woodland and Caddo Period Sites at Toledo Bend Reservoir, Northwest Louisiana and East Texas
    Volume 2015 Article 24 2015 Woodland and Caddo Period Sites at Toledo Bend Reservoir, Northwest Louisiana and East Texas Timothy K. Perttula Heritage Research Center, Stephen F. Austin State University, [email protected] Mark Walters Heritage Research Center, Stephen F. Austin State University, [email protected] Follow this and additional works at: https://scholarworks.sfasu.edu/ita Part of the American Material Culture Commons, Archaeological Anthropology Commons, Environmental Studies Commons, Other American Studies Commons, Other Arts and Humanities Commons, Other History of Art, Architecture, and Archaeology Commons, and the United States History Commons Tell us how this article helped you. Cite this Record Perttula, Timothy K. and Walters, Mark (2015) "Woodland and Caddo Period Sites at Toledo Bend Reservoir, Northwest Louisiana and East Texas," Index of Texas Archaeology: Open Access Gray Literature from the Lone Star State: Vol. 2015, Article 24. https://doi.org/10.21112/.ita.2015.1.24 ISSN: 2475-9333 Available at: https://scholarworks.sfasu.edu/ita/vol2015/iss1/24 This Article is brought to you for free and open access by the Center for Regional Heritage Research at SFA ScholarWorks. It has been accepted for inclusion in Index of Texas Archaeology: Open Access Gray Literature from the Lone Star State by an authorized editor of SFA ScholarWorks. For more information, please contact [email protected]. Woodland and Caddo Period Sites at Toledo Bend Reservoir, Northwest Louisiana and East Texas Creative Commons License This work is licensed under a Creative Commons Attribution 4.0 License. This article is available in Index of Texas Archaeology: Open Access Gray Literature from the Lone Star State: https://scholarworks.sfasu.edu/ita/vol2015/iss1/24 Woodland and Caddo Period Sites at Toledo Bend Reservoir, Northwest Louisiana and East Texas Timothy K.
    [Show full text]
  • Future of Irrigated Agriculture and the Transfer of Irrigation Use State Bar
    Future of Irrigated Agriculture and the Transfer of Irrigation Use GLENN JARVIS, ESQ. Law Offices of Glenn Jarvis Inter National Bank Bldg. 1801 S. 2nd Street, Ste. 550 McAllen, TX 78503 State Bar of Texas 12th Annual Changing Face of Water Rights Course February 24-25, 2011 San Antonio, Texas Chapter 15 Future of Irrigated Agriculture and the Transfer of Irrigation Use Chapter 15 TABLE OF CONTENTS I. The Setting - Where are We? ........................................................................................................................... 1 A. INTRODUCTION ............................................................................................................................... 1 B. REALITIES OF OUR TIME .............................................................................................................. 1 II. What We Are Doing ......................................................................................................................................... 4 A. SURFACE WATER RIGHTS -A Case Study on the Rio Grande - A Large Agricultural Area - Conversion of Irrigation Rights to Municipal and Industrial Rights, Legislation and Marketing ................................................................................ 5 (1) Background ............................................................................................................... 6 (2) Conversion of Irrigation Water Rights to Municipal on Urban Lands ....................... 9 (3) Water Marketing in the Lower and Middle Rio Grande .........................................
    [Show full text]
  • MEXICO Las Moras Seco Creek K Er LAVACA MEDINA US HWY 77 Springs Uvalde LEGEND Medina River
    Cedar Creek Reservoir NAVARRO HENDERSON HILL BOSQUE BROWN ERATH 281 RUNNELS COLEMAN Y ANDERSON S HW COMANCHE U MIDLAND GLASSCOCK STERLING COKE Colorado River 3 7 7 HAMILTON LIMESTONE 2 Y 16 Y W FREESTONE US HW W THE HIDDEN HEART OF TEXAS H H S S U Y 87 U Waco Lake Waco McLENNAN San Angelo San Angelo Lake Concho River MILLS O.H. Ivie Reservoir UPTON Colorado River Horseshoe Park at San Felipe Springs. Popular swimming hole providing relief from hot Texas summers. REAGAN CONCHO U S HW Photo courtesy of Gregg Eckhardt. Y 183 Twin Buttes McCULLOCH CORYELL L IRION Reservoir 190 am US HWY LAMPASAS US HWY 87 pasas R FALLS US HWY 377 Belton U S HW TOM GREEN Lake B Y 67 Brady iver razos R iver LEON Temple ROBERTSON Lampasas Stillhouse BELL SAN SABA Hollow Lake Salado MILAM MADISON San Saba River Nava BURNET US HWY 183 US HWY 190 Salado sota River Lake TX HWY 71 TX HWY 29 MASON Buchanan N. San G Springs abriel Couple enjoying the historic mill at Barton Springs in 1902. R Mason Burnet iver Photo courtesy of Center for American History, University of Texas. SCHLEICHER MENARD Y 29 TX HW WILLIAMSON BRAZOS US HWY 83 377 Llano S. S an PECOS Gabriel R US HWY iver Georgetown US HWY 163 Llano River Longhorn Cavern Y 79 Sonora LLANO Inner Space Caverns US HW Eckert James River Bat Cave US HWY 95 Lake Lyndon Lake Caverns B. Johnson Junction Travis CROCKETT of Sonora BURLESON 281 GILLESPIE BLANCO Y KIMBLE W TRAVIS SUTTON H GRIMES TERRELL S U US HWY 290 US HWY 16 US HWY P Austin edernales R Fredericksburg Barton Springs 21 LEE Somerville Lake AUSTIN Pecos
    [Show full text]
  • May 2018 Monthly Water Quality Report
    SABINE RIVER AUTHORITY OF TEXAS TO: INTERESTED PARTIES FROM: ENVIRONMENTAL SERVICES DIVISION RE: MAY 2018 MONTHLY WATER QUALITY REPORT The Environmental Services Field Offices conducted water quality monitoring in the Sabine Basin from May 7th through the 10th. The results of field monitoring are presented in this report and additional results can be found using the Texas Commission on Environmental Quality (TCEQ) Clean Rivers Program Data Tool: https://www80.tceq.texas.gov/SwqmisWeb/public/crpweb.faces Sabine Basin Tidal (Including Tributaries) Weather – Air temperatures in the tidal basin were warm with highs in the 80s. Low temperatures ranged in the upper 50s to low 70s. The tidal stations received 0.12 inches of rainfall in the seven days prior to the sampling event. Tidal Conditions – Surface salinity values were not greater than 2 ppt at any of the six tidal stations. The highest salinity value of 0.8 ppt was recorded at station 10391 (SRT1) at a depth of 9.0 meters. Lower Sabine Basin (Toledo Bend Reservoir and the Sabine River downstream to Tidal) Weather – Air temperatures in the lower basin were warm with highs in the 80s. Low temperatures ranged in the upper 50s to upper 60s. Toledo Bend received 0.55 inches of rainfall during the seven days prior to the sampling event. Lake Level - The level of Toledo Bend was 170.7 feet with a daily average discharge of 4,251 cfs on the day of sampling. Toledo Bend has a conservation pool level of 172 feet msl. Reservoir profiles indicated water column is stratified. Upper Sabine Basin (Lake Tawakoni, Lake Fork Reservoir, and the Sabine River upstream of Toledo Bend) Weather - Air temperatures in the upper basin were warm with highs in the low 70s to upper 80s.
    [Show full text]
  • Far West Region
    CHAPTER FIVE Far West Region California, Oregon, Washington, Alaska, Nevada, Idaho, Pacific Islands North 0 100 200 Kilometers 0 100 200 Miles WASHINGTON OREGON IDAHO NEVADA ALASKA CALIFORNIA HAWAII United States Territories AMERICAN SAMOA GUAM Faces and Places of Cooperative Conservation 113 COOPERATIVE CONSERVATION CASE STUDY California Tribal Partnerships PHOTO BY KEN WILSON Traditional Native American Values Support Forest Management Location: California Project Summary: A unique blend of traditional Native American practices and today’s science preserves native customs and contributes to forest health. Children practice indigenous basket weaving techniques at a camp in California that sustains traditional cultural practices. Resource Challenge working with weavers, volunteers manage forests for future Over thousands of years, native peoples learned to manage the land, basketry materials, thinning heavy fuels and building fi re breaks using practices such as controlled burns to create a healthy landscape. to prepare for Forest Service controlled burns. More than 500 The USDA Forest Service in California is consulting and collaborating participants have volunteered 2,800 hours, saving $25,000 in with tribes on more than 50 projects. Several are government-to- taxpayer dollars. The National Advisory Council on Historic government agreements, with both entities pledging to cooperatively Preservation and the Governor of California have both awarded protect and restore the ecological health of land. Restoring and the project for enhancing traditional forest management in sustaining culturally important plants and re-introducing fi re as a tool California. for forest renewal are two of the primary objectives. • The Maidu Cultural Development Group Stewardship Project (MCDG) Examples of Key Partners is integrating traditional land practices with modern resource USDA Forest Service, Karuk Indigenous Weavers, California Indian management on 2,100 acres of the Plumas National Forest.
    [Show full text]
  • States & Capitals
    United States West Region States & Capitals Maps & Flashcards This product contains 3 maps of the West Region of the United States. Study guide map labeled with the states and capitals (which can also be used as an answer key) Blank map with a word bank of the states and capitals Blank map without word bank Also included are 3 different versions of flashcards to study states and/or capitals. State shaded within the region on the front with state name on the back State name and outline on the front with capital on the back State outline on the front with state name and capital on the back To create flashcards: print, fold along solid line, cut on dotted lines. I glue the folded halves together, and then laminate for longevity. West: Alaska, California, Colorado, Hawaii, Idaho, Montana, Nevada, Oregon, Utah, Washington, Wyoming Correlates to Massachusetts History & Social Science Learning Standard 4.10 I hope you find this product useful in your classroom. If you have any questions or comments, please contact me at [email protected]. 2013-2014 Copyright Mrs LeFave Name Date West States & Capitals Map Study Guide ALASKA Juneau * WASHINGTON *Olympia *Helena *Salem MONTANA OREGON *Boise IDAHO WYOMING Cheyenne Sacramento * * * *Carson City Salt Lake City *Denver NEVADA UTAH COLORADO CALIFORNIA * Honolulu HAWAII 2013-2014 Copyright Mrs LeFave Name Date West States & Capitals Map ALASKA Boise CALIFORNIA Carson City COLORADO Cheyenne HAWAII Denver IDAHO Helena MONTANA Honolulu NEVADA Juneau OREGON Olympia UTAH Sacramento WASHINGTON Salem
    [Show full text]
  • Toledo Bend Reservoir: a Study of User Characteristics, Patterns, Preferences Alvin Lee Bertrand
    Louisiana State University LSU Digital Commons LSU Agricultural Experiment Station Reports LSU AgCenter 1973 Toledo Bend Reservoir: a study of user characteristics, patterns, preferences Alvin Lee Bertrand Follow this and additional works at: http://digitalcommons.lsu.edu/agexp Part of the Agriculture Commons Recommended Citation Bertrand, Alvin Lee, "Toledo Bend Reservoir: a study of user characteristics, patterns, preferences" (1973). LSU Agricultural Experiment Station Reports. 308. http://digitalcommons.lsu.edu/agexp/308 This Article is brought to you for free and open access by the LSU AgCenter at LSU Digital Commons. It has been accepted for inclusion in LSU Agricultural Experiment Station Reports by an authorized administrator of LSU Digital Commons. For more information, please contact [email protected]. itterns, Preference Ivin L. iBertran lames G.Hoov^^^^^i^ ^^BulletinNo.67$J ij^m)UISIANA STATE UNIVERSITY AND GRICULTURAL AND MECHANICAL C GRICULTURAL EXPERIMENT STATION )OYLE CHAMBERS. DIRECTOR Table of Contents Page Introduction 5 Objectives of the Study 5 Historical Background 6 Description of Toledo Bend Reservoir 8 Methodological Procedure 8 Demographic Characteristics of Toledo Bend Users 9 Occupation 9 Age and Sex U Education 14 Family Income 16 Residence 18 Characteristics of Recreation Expeditions 19 Distance Traveled I9 Day of Arrival and Length of Stay 23 Nature of Trip 24 Type of Accommodations Used 25 Boats and Motors Transported to Toledo Bend 26 Recreation Activities 27 Expenditures for Toledo Bend Expeditions 29 Group Nature of Recreation Experience 30 Size of Party 30 Types of Groups 31 Users' Opinions and Preferences Regarding Toledo Bend Facilities . 32 Opinions Regarding Toledo Bend as a Tourist Attraction 32 Opinions Regarding Facilities Available at Specific Toledo Bend Sites 33 Opinions Regarding the Toledo Bend Development as a Whole 34 Preferences Regarding Control of Toledo Bend Facilities 36 Opinions Regarding Funding Sources for Toledo Bend Type Developments 36 Conclusions 37 2 List of Tables Page users in sample population 10 1.
    [Show full text]
  • TRICARE West Region Provider Handbook Will Assist You in Delivering TRICARE Benefits and Services
    TRICARE® West Region Provider Handbook Your guide to TRICARE programs, policies and procedures January 1–December 31, 2019 Last updated: July 1, 2019 An Important Note about TRICARE Program Information This TRICARE West Region Provider Handbook will assist you in delivering TRICARE benefits and services. At the time of publication, July 1, 2019, the information in this handbook is current. It is important to remember that TRICARE policies and benefits are governed by public law, federal regulation and the Government’s amendments to Health Net Federal Services, LLC’s (HNFS’) managed care support (MCS) contract. Changes to TRICARE programs are continually made as public law, federal regulation and HNFS’ MCS contract are amended. For up-to-date information, visit www.tricare-west.com. Contracted TRICARE providers are obligated to abide by the rules, procedures, policies and program requirements as specified in this TRICARE West Region Provider Handbook, which is a summary of the TRICARE regulations and manual requirements related to the program. TRICARE regulations are available on the Defense Health Agency (DHA) website at www.tricare.mil. If there are any discrepancies between the TRICARE West Region Provider Handbook and TRICARE manuals (Manuals), the Manuals take precedence. Using This TRICARE West Region Provider Handbook This TRICARE West Region Provider Handbook has been developed to provide you and your staff with important information about TRICARE, emphasizing key operational aspects of the program and program options. This handbook will assist you in coordinating care for TRICARE beneficiaries. It contains information about specific TRICARE programs, policies and procedures. TRICARE program changes and updates may be communicated periodically through TRICARE Provider News and the online publications.
    [Show full text]
  • Salt Sources, Loading and Salinity of the Pecos River
    INFLUENCE OF TRIBUTARIES ON SALINITY OF AMISTAD INTERNATIONAL RESERVOIR S. Miyamoto, Fasong Yuan and Shilpa Anand Texas A&M University Agricultural Research Center at El Paso Texas Agricultural Experiment Station An Investigatory Report Submitted to Texas State Soil and Water Conservation Board and U.S. Environmental Protection Agency In a partial fulfillment of A contract TSSWCB, No. 04-11 and US EPA, No. 4280001 Technical Report TR – 292 April 2006 ACKNOWLEDGEMENT The study reported here was performed under a contract with the Texas State Soil and Water Conservation Board (TSSWCB Project No. 04-11) and the U.S. Environmental Protection Agency (EPA Project No. 4280001). The overall project is entitled “Basin-wide Management Plan for the Pecos River in Texas”. The materials presented here apply to Subtask 1.6; “River Salinity Modeling”. The cost of exploratory soil sample analyses was defrayed in part by the funds from the Cooperative State Research, Education, and Extension Service, U.S. Department of Agriculture under Agreement No. 2005-34461-15661. The main data set used for this study came from an open file available from the U.S. Section of the International Boundary and Water Commission (US- IBWC), and some from the Bureau of Reclamation (BOR). Administrative support to this project was provided by the Texas Water Resource Institute (TWRI). Logistic support to this project was provided by Jessica N. White and Olivia Navarrete, Student Assistants. This document was reviewed by Nancy Hanks of the Texas Clean Rivers Program (TCRP), Gilbert Anaya of the US-IBWC, and Kevin Wagner of the Texas Water Resource Institute (TWRI).
    [Show full text]
  • Water-Supply Limitations on Irrigation from the Rio Grande in Starr, Hidalgo, Cameron, and Willaey Counties, Texas, on the Basis of the Twe Methods
    ,. TEXAS WATER CQM}ITSSION Joe D. Carter, Chairman William E. Berger, Commissioner O. F. Dent, Commissioner BULLETIN 6413 A AP PEN 0 ICE S T 0 B U L LET IN 6 4 1 3 WATER-SUPPLY LIMITATIONS ON IRRIGATION FROM THE RIO GRAf'..'DE IN STARR, HIDALGO J CMtERON, AND WILLACY COUNTIES 1 TEXAS By John T. Carr, Jr., t. C. Janca, Robert L. Warzecha, Ralph B. Hendricks, Allen E. Richardson, Henry H. Porterfield, Jr., and PauL T. Gillett August 1965 ( Published and distributed by the ( Texas Water Commission Post Office Box 12311 Austin, Texas 78711 ( Authorization for use or reproduction of any original oaterial contained in this publication, i. e., not obtained from other sources) is freely granted without the necessity of securing permission therefor. The Commission would ap­ ( preciate acknowledgement of the source of original material so utilized. ( ( FOREWORD These appendices are the reports on the separate investigations and studies undertaken to obtain pertinent data and to develop bases for the selection of criteria for use in the comprehensive study summarized in the Texas Water Com­ mission Bulletin 6413, '~ater-Supply Limitations on Irrigation From the Rio Grande in Starr, Hidalgo, Cameroo, and IHllacy Counties, Texas," November 1964, and are supplementary thereto. The criteria and assumptions used in the various phases of the computations made in this comprehensive study were selected and determined by John J. Vandertulip, Chief Engineer; Louis L. McDaniels, Research Program Coordinator; and C. Olen Rucker, Hydrology Program Coordinator in collaboration ~"'ith the personnel engaged in this study. The appendices were prepared in final form by Mr.
    [Show full text]
  • Texas Water Meetings Could Impact Toledo Bend
    Texas water meetings could impact Toledo Bend Shreveport Times By Vickie Welborn . [email protected] . May 5, 2008 • Louisiana's Sabine River Authority officials will be keeping an eye on their neighbors in Texas in the coming weeks as public meetings are scheduled to solicit input on the maintenance of that state's rivers and streams. What, if anything, is ultimately decided could have an impact in Louisiana, too, since one of those waterways, the Sabine River, is shared by the adjoining states and is the source for Toledo Bend Reservoir. Of primary concern is if any change is made to the required flow of the Sabine River below the reservoir's dam. "This could impact Toledo Bend by requiring additional releases from the reservoir for downstream environmental conditions," SRA Executive Director Jim Pratt said. Doing so has the potential of undoing a long-sought agreement finally inked last year between the SRAs in Louisiana and Texas, as well as the utility companies that benefit from the reservoir's hydroelectric power plant, which requires power generation to cease once the 186,000-acre reservoir reaches 168 feet mean sea level. "Texas Parks and Wildlife has published an initial study that requires more than historical flows in the lower Sabine, and my understanding is they have determined we need to continue to release approximately 1-million acre-feet during the May to September period, which is contrary to the 168 feet minimum we have agreed to," Pratt said. Meetings Tuesday and Wednesday in Orange, Texas, will explain the technical studies and gather public knowledge and vision for the Sabine River.
    [Show full text]
  • 2014 Texas Surface Water Quality Standards
    Presented below are water quality standards that are in effect for Clean Water Act purposes. EPA is posting these standards as a convenience to users and has made a reasonable effort to assure their accuracy. Additionally, EPA has made a reasonable effort to identify parts of the standards that are not approved, disapproved, or are otherwise not in effect for Clean Water Act purposes. 2014 Texas Surface Water Quality Standards (updated September 23, 2014) EPA has not approved the definition of “surface water in the state” in the TX WQS, which includes an area out 10.36 miles into the Gulf of Mexico by reference to §26.001 of the Texas Water Code. Under the CWA, Texas does not have jurisdiction to establish water quality standards more than three nautical miles from the coast, but does not extend past that point. Beyond three miles, EPA retains authority for CWA purposes. EPA’s approval also does not include the application the TX WQS for the portions of the Red River and Lake Texoma that are located within the state of Oklahoma. Finally, EPA is not approving the TX WQS for those waters or portions of waters located in Indian Country, as defined in 18 U.S.C. 1151. The following sections in the 2014 Texas WQS have been approved by EPA and are therefore effective for CWA purposes: • §307.1. General Policy Statement • §307.2. Description of Standards • §307.5. Antidegradation • §307.6. Toxic Materials (see “No Action” section) • §307.8. Application of Standards (see “No Action” section) • Appendix B – Sole-source Surface Drinking Water Supplies • Appendix E – Site-specific Toxic Criteria • Appendix F – Site-specific Nutrient Criteria for Selected Reservoirs (see “No Action” section) The following sections in the 2014 Texas WQS have been approved by EPA, except for specific items as noted: • §307.3.
    [Show full text]