TAILIEUCHUNG - Comparison of erosion and runoff predicted by WEPP and AGNPS models using a geographic information system

The Water Erosion Prediction Project (WEPP) model and the Agricultural Non-Point-Source Pollution Model (AGNPS) were used in conjunction with a geographic information system (GIS) database to predict runoff and sediment discharges for Rock Creek watershed, an agricultural watershed in Ohio, USA. | Turk J Agric For 26 (2002) 261-268 © TÜB‹TAK Comparison of Erosion and Runoff Predicted by WEPP and AGNPS Models Using a Geographic Information System Halil KIRNAK University of Harran, Faculty of Agriculture, Agricultural Structures and Irrigation, 63200, fianl›urfa - TURKEY Received: Abstract: The Water Erosion Prediction Project (WEPP) model and the Agricultural Non-Point-Source Pollution Model (AGNPS) were used in conjunction with a geographic information system (GIS) database to predict runoff and sediment discharges for Rock Creek watershed, an agricultural watershed in Ohio, USA. Observed and predicted values were compared for selected storm events in 1988 and 1990. The statistical evaluation of the WEPP and AGNPS models showed that WEPP predicted average runoff, peak runoff and sediment yield better than AGNPS. WEPP and AGNPS overpredicted peak runoff rates compared to observed data by and , respectively. The t-test showed that there was no significant statistical difference between measured and predicted runoff and sediment data for both models (at ∝ = level). The average root mean square error between observed 3 -1 3 -1 and predicted average runoff was m s and 14 m s for WEPP and AGNPS, respectively. While AGNPS underestimated average sediment discharge by 17%, WEPP overestimated average sediment load by 37%. With careful parameterization, the study demonstrated that WEPP and AGNPS could be used to simulate runoff and sediment in agricultural watersheds. Key Words: Modeling, WEPP, AGNPS, Surface runoff, Soil erosion. Co¤rafi Bilgi Sistemleri Yard›m›yla Erozyon ve Yüzey Ak›fl Tahmininde Kullan›lan WEPP ve AGNPS Modellerinin Karfl›laflt›r›lmas› Özet: WEPP ve AGNPS modelleri, co¤rafi bilgi sistemi ile birlikte, Ohio-USA’da yer alan Rock Creek tar›msal havzas›ndaki yüzey ak›fl ile birlikte erozyonun tahmin edilmesinde kullan›lm›flt›r. Bilgisayar simülasyonu, 1988 ve 1990 y›llar› aras›nda gözlenen ve tahmin edilen veriler .

• Nông nghiệp
• Water erosion prediction project
• Surface runoff
• Soil erosion
• Agricultural non point source
• Geographic information system
• Remote sensing
• National park
• Rhododendron arboreum SM
• Hệ thống thông tin địa lý
• Thích nghi cà phê
• Cà phê tại huyện Di Linh
• Đánh giá thích nghi cà phê
• Quy hoạch cây cà phê
• Remote sensing technique
• Outlet area
• Cua Viet outlet area
• Erosion phenomena occur
• Public health
• Flood disaster
• Structural equation model
• Public health issues
• Agricultural database
• Remote sensing
• Geographic information systems
• Common agricultural policy
• Greenhouse growing
• Geographical information system
• Relative yield
• Crop yield
• Electrical conductivity
• Natural ecosystems
• Re evaluated conservation status of Salvia
• Aegean geographic regions
• Non endemic rare
• Human encroachment seems
• Database system
• Lecture Database system
• Temporal database
• Database technologies
• Data warehousing
• Marine Electronic Highway
• The Traffic Separation Scheme
• The oil industry
• The Geographic Information System
• The Space borne Synthetic Aperture Radar
• Problem of flooding and drought
• Impact of the water system
• Poor watershed area
• Accumulation of sediment
• Observational description method
• Emerging research directions in DBs/ISs
• Mobile databases
• Multimedia databases
• BMC Cancer
• Upper urothelial carcinoma
• Balkan endemic nephropathy
• Standardized incidence ratio
• trình bày báo cáo
• tài liệu báo cáo khoa học
• nghiên cứu y học
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• Mô hình dữ liệu không gian
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• Truy vấn dữ liệu GIS
• Hiển thị dữ liệu GIS
• Ứng dụng GIS xây dựng dữ liệu
• Cơ sở dữ liệu môi trường
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• Quản lý môi trường
• Detection of shoreline changes
• A geospatial data analysis
• Vung Tau city
• Department of earth resources and environment
• Land suitability assessment
• Rice cultivation
• Grain yield
• Spatial model
• Soil loss
• Kuseyr plateau
• Agricultural lands
• Global land cover characterization
• Seyhan river
• Soil and water assessment tool
• Sediment yield
• Multicriteria assessment
• Bafra delta plain
• Coarser textured soils
• ICONA erosion model
• Digital elevation model
• Parametric evaluation
• Irrigation methods
• Soil characteristics
• Topographic conditions