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Index of Stations—Surface-Water Data-Collection Network of Texas, September 1999 Open-File Report 01–103 U.S. Department of the Interior U.S. Geological Survey U.S. Department of the Interior U.S. Geological Survey Index of Stations—Surface-Water Data-Collection Network of Texas, September 1999 By S.C. Gandara and D.L. Barbie U.S. GEOLOGICAL SURVEY Open-File Report 01–103 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 Introduction .......................................................................................................................................................................... 1 Definition of Stations ........................................................................................................................................................... 2 Availability of Data .............................................................................................................................................................. 2 PLATE (Plate is in pocket) 1. Map showing locations of stations in the surface-water data-collection network of Texas, September 1999 TABLE 1. Streamflow, surface-water, water-quality, reservoir-content, and partial-record stations maintained by the U.S. Geological Survey in cooperation with Federal, State, and local agencies, September 1999 ................ 4 CONTENTS iii Index of Stations—Surface-Water Data-Collection Network of Texas, September 1999 Compiled by S.C. Gandara and D.L. Barbie INTRODUCTION George B. Ozuna, Subdistrict Chief U.S. Geological Survey The U.S. Geological Survey (USGS) investiga- 5563 De Zavala tions of the water resources of Texas are conducted in Suite 290 cooperation with the Texas Water Development Board, San Antonio, TX 78249–1735 U.S. Army Corps of Engineers, Bureau of Reclamation, Stanley Baldys III, Field Office Chief International Boundary and Water Commission, river Field Headquarters authorities, cities, counties, and other government or U.S. Geological Survey water agencies. 3010 Buchanan Street Investigations are under the general direction of Wichita Falls, TX 76308–1709 the District Chief, Texas District. The address of the Texas District office is 8027 Exchange Drive, Austin, As of September 30, 1999, the surface-water TX 78754–4733. data-collection network of Texas (table 1) included 321 continuous-record streamflow stations (D), Information regarding hydrologic data collected 20 continuous-record gage-height only stations (G), within their respective areas can be obtained from the 24 crest-stage partial-record stations (C), 40 flood- Subdistrict or Field offices listed below: hydrograph partial-record stations (H), 25 low-flow partial-record stations (L), 1 continuous-record Michael E. Dorsey, Field Office Chief temperature station (M1), 25 continuous-record Field Headquarters temperature and specific conductance stations (M2), U.S. Geological Survey 17 continuous-record temperature, specific conduc- 8027 Exchange Drive tance, dissolved oxygen, and pH stations (M4), 4 daily Austin, TX 78754–4733 water-quality stations (Qd), 115 periodic water-quality stations (Qp), 17 reservoir/lake surveys for water David S. Brown, Field Office Chief quality stations (Qs), 85 continuous or daily reservoir- Field Headquarters content stations (R), and 10 daily precipitation stations U.S. Geological Survey (Pd). Plate 1 identifies the major river basins in Texas 2775 Alta Mesa Boulevard and shows the location of the stations listed in table 1. Fort Worth, TX 76133–5803 Table 1 shows the station number and name, Joseph D. Broadus, Subdistrict Chief latitude and longitude, type of station, and office U.S. Geological Survey responsible for the collection of the data and mainte- 2320 LaBranch Street, Room 1112 nance of the record. An 8-digit permanent numerical Houston, TX 77004–1099 designation for all gaging stations has been adopted on a nationwide basis; stations are numbered and listed in JimmyG.Pond,FieldOfficeChief downstream order. In the downstream direction along Field Headquarters the main stem, all stations on a tributary entering U.S. Geological Survey between two main-stem stations are listed between 944 Arroyo Drive these two stations. A similar order is followed in listing San Angelo, TX 76903–9345 stations by first rank, second rank, and other ranks of INTRODUCTION 1 tributaries. The rank of any tributary, with respect to the quality equipment. The data generally are recorded at 1- stream to which it is an immediate tributary, is indicated hour fixed increments. For each of these stations where by an indention in the table. Each indention represents streamflow records are available, discharge-weighted- one rank. This downstream order and system of inden- average concentrations and loads of selected chemical tion shows which gaging stations are on tributaries constituents are computed using the continuous record of specific conductance and the regression relation between any two stations on a main stem and the rank between values of each chemical constituent and of the tributary on which each gaging station is situated. specific conductance. Daily water-quality station (Qd) is a water-quality station DEFINITION OF STATIONS where samples are collected and specific conductance and water temperature are measured once daily or more Continuous-record streamflow station (D) is a station frequently. For each of these stations, where discharge where a gage is maintained from which a continuous records are available, discharge-weighted-average record of stage is monitored. The stage generally is concentrations and loads of selected chemical recorded at 15-minute fixed intervals. Measurements of constituents are computed using the daily record of flow are made to develop a stage-discharge relation. specific conductance and regression relation between Discharge records, showing the daily mean discharge each chemical constituent and specific conductance. and peak discharges for the major floods of each year, and total monthly and yearly runoff expressed in inches Periodic water-quality station (Qp) is a water-quality and (or) acre-feet, are computed, compiled, and station where samples are collected periodically (usually published on the basis of the water year ending from 2 to 10 samples per year) for the analysis of major September 30. Where possible, preliminary data are inorganic constituents and related properties. Most of available near-real time on the World Wide Web at these stations are operated in conjunction with a http://tx.usgs.gov/. streamflow station. An attempt is made to collect samples over a wide range in discharge. Some of these Continuous-record gage-height only station (G) is a station stations are equipped with stage-activated automatic where only the record of stage referenced to some samplers to facilitate the collection of multiple samples arbitrary gage datum, usually mean sea level, is during storm runoff. collected. Reservoir/lake surveys for water quality (Qs) are surveys Partial-record station is a station where limited streamflow of comprehensive water-quality data-collection stations data are collected systematically. Because the number of on selected reservoirs in the State. Each reservoir will streams for which information is desired far exceeds the have three or more primary sites and several secondary number of stations feasible to operate for continuous sites. Field measurements of temperature, specific record, the USGS collects limited streamflow data at conductance, dissolved oxygen, and pH are made at partial-record stations. The three basic types of partial- 5- or 10-foot depth intervals at each primary and record stations are: secondary site. In addition, major inorganic constituents, Crest-stage partial-record station (C) is operated to nutrients, and selected trace elements are collected from define annual maximum stages and, at some near the surface and near the bottom of all primary sites. stations, annual maximum discharges. During periods of thermal stratification, additional Flood-hydrograph partial-record station (H) is nutrient samples and samples for analysis of dissolved operated to define stages and discharges during one iron and dissolved manganese are collected just above or more annual high-flow events or to compute and below the thermocline of primary sites. daily mean discharges exceeding a defined Continuous or daily reservoir-content station (R) is a discharge. station where a daily record of stage is obtained from Low-flow partial-record station (L) is operated to which a daily value of content (usually at 2400 hours) is define stages and discharges during one or more computed, compiled, and published. annual low-flow events or, at some stations, to Daily precipitation station (Pd) is a station where compute daily mean discharges less than a defined precipitation is collected continuously throughout the discharge. Discharge measurements at low-flow year. Precipitation volume is recorded in inches at 15- partial-record stations are made during periods of minute intervals.
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