In cooperation with the Texas Water Development Board
Evaluation of the
Streamflow-Gaging Network
of Texas and a Proposed Core Network
By Raymond M. Slade, Jr., Teresa Howard, and Roberto Anaya
U.S. Geological Survey
Water-Resources Investigations Report 01–4155
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Contents
Abstract
Introduction
Background
Purpose and Scope
Streamflow Network Analysis
History of Streamflow Gaging in Texas
Network Evaluations in Texas
Network Funding and Data Uses
Major Objectives of a Core Network
Evaluation of the Existing Network
Hydrologic Regions
Regional Optimization Model
Flow Correlation
Proposed Core Network
Summary
References
Plate
1. |
Map showing locations of stations in the proposed core streamflow network of Texas |
Figures
1. |
Graph showing number of daily mean and annual peak streamflow stations in Texas, 1898–1996 | |
2. |
Map showing locations of active and discontinued daily streamflow stations, October 1, 1998 | |
3. |
Map showing hydrologic regions and major basins of Texas | |
4–9. |
Graphs showing relation between mean sampling error, number of streamflow-gaging stations, and planning horizon for: | |
4. |
Mean annual streamflow in hydrologic regions 1–4 | |
5. |
Mean annual streamflow in hydrologic regions 5–8 | |
6. |
Mean annual streamflow in hydrologic regions 9–11 | |
7. |
25-year peak streamflow in hydrologic regions 1–4 | |
8. |
25-year peak streamflow in hydrologic regions 5–8 | |
9. |
25-year peak streamflow in hydrologic regions 9–11 | |
10–11. |
Maps showing correlation of annual mean streamflow between paired streamflow-gaging stations in: | |
10. |
North Texas | |
11. |
South Texas | |
12–13. |
Maps showing correlation of annual peak streamflow between paired streamflow-gaging stations in: | |
12. |
North Texas | |
13. |
South Texas |
Tables
1. |
Correlation coefficients of annual mean streamflows for paired stations in north Texas basins |
2. |
Correlation coefficients of annual mean streamflows for paired stations in south Texas basins |
3. |
Correlation coefficients of annual peak streamflows for paired stations in north Texas basins |
4. |
Correlation coefficients of annual peak streamflows for paired stations in south Texas basins |
5. |
Core network of streamflow-gaging stations in Texas |
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