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Home > Society and Social Sciences > Politics and government > Summary Statistics and Graphical Comparisons of Historical Hydrologic and Water-Quality Data; Seco Creek Watershed, South-Central Texas: Usgs Open-File Report 98-627
Summary Statistics and Graphical Comparisons of Historical Hydrologic and Water-Quality Data; Seco Creek Watershed, South-Central Texas: Usgs Open-File Report 98-627

Summary Statistics and Graphical Comparisons of Historical Hydrologic and Water-Quality Data; Seco Creek Watershed, South-Central Texas: Usgs Open-File Report 98-627


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About the Book

The U.S. Geological Survey collected hydrologic (rainfall, streamflow, and reservoir content) and water-quality data in the Seco Creek watershed, south-central Texas. Most of the data from 15 sites were collected as part of a study in cooperation with the U.S. Department of Agriculture and the Texas State Soil and Water Conservation Board to evaluate the effects of agricultural best-management practices on surface- and ground-water quantity and quality in the 255-square-mile watershed. Nearly 400 best-management practices at 58 sites were implemented by landowners in the watershed during March 1990-September 1995. Most of the data are from the early 1990s, the period during and after implementation of best-management practices. Data from five sites include water quality and are summarized in tables and graphics in the text; and data from all 15 sites are summarized on a diskette. Maximum annual rainfall among the sites for which data are presented in the text (excluding one site) for the during-and-after-implementation period (March 1990-September 1995) was 53.27 inches in water year 1992. Maximum annual total streamflow among the sites for the period was 63,400 acre-feet, also in water year 1992. At the one site with water-quality data (under base-flow conditions) for both the before-implementation period and the during-and-after implementation period of best-management practices, percentiles (5, 25, 50, 75, 95) for specific conductance, nitrate concentration, and fecal coliform density were less for the during-and-after-implementation period than for the before-implementation period.


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Product Details
  • ISBN-13: 9781288865963
  • Publisher: Bibliogov
  • Publisher Imprint: Bibliogov
  • Height: 246 mm
  • Sub Title: Usgs Open-File Report 98-627
  • Width: 189 mm
  • ISBN-10: 1288865961
  • Publisher Date: 01 Mar 2013
  • Binding: Paperback
  • Spine Width: 3 mm
  • Weight: 100 gr


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Summary Statistics and Graphical Comparisons of Historical Hydrologic and Water-Quality Data; Seco Creek Watershed, South-Central Texas: Usgs Open-File Report 98-627
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Summary Statistics and Graphical Comparisons of Historical Hydrologic and Water-Quality Data; Seco Creek Watershed, South-Central Texas: Usgs Open-File Report 98-627
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