VALIDATION OF THE SWAT MODEL ON A LARGE RWER BASIN WITH POINT AND NONPOINT SOURCES1

Journal of the American Water Resources Association - Tập 37 Số 5 - Trang 1169-1188 - 2001
C. Santhi1,2,3,4,5, Jeffrey G. Arnold1,2,3,4,5, J. R. Williams1,2,3,4,5, William A. Dugas1,2,3,4,5, Raghavan Srinivasan1,2,3,4,5, Larry M. Hauck1,2,3,4,5
1Associate Professor and Director of Spatial Sciences Lab, Blackland Research Center, 700 East University Drive, Suite 104, College Station, Texas 77840
2Hydraulic Engineer, USDA/ARS, 808 East Blackland Road, Temple, Texas 76502
3Professor and Resident Director, Blackland Research Center, 720 East Blackland Road, Temple, Texas 76502–9622
4Research Scientist, Blackland Research Center, 720 East Blackland Road, Temple, Texas 76502–9622
5Respectively, Post Doctoral Research Scientist, Blackland Research Center, 720 East Blackland Road, Temple, Texas 76502–9622

Tóm tắt

ABSTRACT: The State of Texas has initiated the development of a Total Maximum Daily Load program in the Bosque River Watershed, where point and nonpoint sources of pollution are a concern. Soil Water Assessment Tool (SWAT) was validated for flow, sediment, and nutrients in the watershed to evaluate alternative management scenarios and estimate their effects in controlling pollution. This paper discusses the calibration and validation at two locations, Hico and Valley Mills, along the North Bosque River. Calibration for flow was performed from 1960 through 1998. Sediment and nutrient calibration was done from 1993 through 1997 at Hico and from 1996 through 1997 at Valley Mills. Model validation was performed for 1998. Time series plots and statistical measures were used to verify model predictions. Predicted values generally matched well with the observed values during calibration and validation (R2≥ 0.6 and Nash‐Suttcliffe Efficiency ≥ 0.5, in most instances) except for some underprediction of nitrogen during calibration at both locations and sediment and organic nutrients during validation at Valley Mills. This study showed that SWAT was able to predict flow, sediment, and nutrients successfully and can be used to study the effects of alternative management scenarios.

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Tài liệu tham khảo

Alexander R. B. R. A.Smith G. E.Schwarz S. D. Stephen.Preston J. W.Brakebill R.Srinivasan andP.Percheo 2000.Atmospheric Nitrogen Flux from the Fluvial Drainages of Major Estuaries in the United States and Application of the SPARROW Watershed Model.Draft of the chapter to be published by the American Geophysical Union on Assessing the Relative Nitrogen Inputs to Coastal Waters from the Atmosphere.

10.2113/gseegeosci.V.3.339

10.1111/j.1752-1688.1999.tb03599.x

10.1016/0022-1694(93)90004-S

10.1111/j.1752-1688.1999.tb04192.x

10.1111/j.1752-1688.1998.tb05961.x

ASAE., 1988, Manure Production and Characteristics. ASAE Standards

10.1029/WR013i002p00303

Brown L. C., 1987, The Enhanced Water Quality Models: QUAL2E and QUAL2E‐UNCAS Documentation and User Manual. EPA/600/3–87/007

Engel B. A., 1993, Nonpoint Source Pollution Modeling Using Models Integrated with Geographic Information Systems, Water Science Technology, 28, 685690

Gassman P. W., 1997, The National Pilot Program Integrated Modeling System: Environmental Baseline Assumptions and Results for the APEX Model. Livestock Series Report 9

Jacobson B. M., 1995, Symposium on Water Quality Modeling, 186

Keplinger K. O., 1999, Cost Savings and Environmental Benefits of Dietary P Reductions for Dairy Cows in the Bosque River Watershed

Leonard R. A., 1980, The Pesticide Submodel

McElroy A. D., 1976, Loading Functions for Assessment of Water Pollution from Nonpomt Sources

McFarland A. M. S., 1995, Livestock and the Environment: Scientific Underpinnings for Policy Analysis

McFarland A. M. S., 1997, Livestock and the Environment: A National Pilot Project Report No. PR97–02

10.2134/jeq1999.00472425002800030014x

Mockus V., 1969, SCS National Engineering Handbook

10.1016/0022-1694(70)90255-6

10.1029/WR026i007p01465

Ramanarayanan T. S., 1996, Third International Conference/Workshop on Integrating Geographic Information Systems and Environmental Modeling

10.1029/1999WR900277

10.13031/2013.3000

Santhi C. J. G.Arnold J. R.Williams L. M.Hauck andW. A.Dugas 2000.Application of a Watershed Model to Evaluate Management Effects on Point and NonPoint Pollution.Transactions of ASAE(in press).

10.1111/j.1752-1688.1994.tb03304.x

TNRCC 1999.State of Texas 1999 Clean Water Act Section 303 (d) List. TNRCC Texas available athttp://www.tnrcc.state.tx.us/adminltopdoc/sfr/058‐99/99_303d.pdf.

USDA‐ARS 1999.Soil and Water Assessment Tool‐Model Documentation. Available athttp://www.brc.tamus.edulswatimanual.

USEPA, 1994, The Quality of Our Nation's Water: 1994. Executive Summary of the National Water Quality Inventory: 1994 Report to United States Congress. EPA841‐S‐94–002

USEPA, 1998, National Water Quality Inventory: 1996 Report to United States Congress. EPA841‐R‐97–008

Walling D. E., 1988, The Reliability of Rating Curve Estimates of Suspended Sediment Yield: Some Further Comments, Sediment Budgets, 174, 337

10.1111/j.1752-1688.1975.tb01817.x

Williams J. R., 1978, Optimal Operation of Large Agricultural Watersheds with Water Quality Constraints. Texas Water Resources Institute

10.13031/2013.32748

10.1111/j.1752-1688.1981.tb02593.x

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Journal of the American Water Resources Association

Tập 37 Số 5

1169-1188

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