( Empirical Model) , ( Chinese Soil Loss Equa2. ; T (Universal Soil Loss Equation,USLE) ( Reversed Universal Soil Loss Equa2 USLE : , USLE

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1 Science of Soil and Water Conservation Vol. 2 No. 1 Mar ( ) GIS BP ; ; ; 1985 USLE RUSLE [2 ] USLE RUSLE 30 RUSLE ( Chinese Soil Loss Equa2 tion CSLE) 3 USLE A = RKLSB ET 1 ( Empirical Model) 111 ; L ; B ; E ; T (Universal Soil Loss Equation USLE) ( Reversed Universal Soil Loss Equa2 tion RUSLE) Wischmeier Smith [1 ] USLE ( B) ( E) ( T) USLE A = RKLSCP [3 A ; R ] ; K ; L ; S ; C ; P 2 A ; R R = EI 30 ; K ; S USLE (2002CB111502) ; ( ) (1980 ) E2mail iswc. ac. cn Tsinghua Tongfang Optical Disc Co. Ltd. All rights reserved.

2 (Areal Non2 M sa / M wa = I 0183 M sa ; M wa ; I tion ANSWERS) Beasley [9 ] ANSWERS I = R R p R 315 s h D 012 h R h D h R p [10 R s ] Beasley [11 ] [4 ] [12 ] M s = 0137 M 1115 J KP M s ; M 212 ; J ; K ; P [13 ] 9 ( ) ; 1 2 ( Physical Process Based Model) point Source Watershed Environmental Response Simula ( Water Erosion Prediction Mod2 el WEPP) USLE E [5 ] 1986 (Water Erosion Prediction Project2WEPP) 1987 E = C A C E f I L S D [6 ] WEPP C A C E ; f I WEPP ; L ; S 0 ; D 50 [14 WEPP ] ( European Soil Ero2 3 sion Model EUROSEM) Morgan [7 ] 2 Horton EUROSEM EUROSEM Yang [8 ] Tsinghua Tongfang Optical Disc Co. Ltd. All rights reserved.

3 GIS [15 ] 1991 De Roo [17 ] LISEM (Limberg Soil Erosion Model) 3 LISEM 1) GIS D b = 01015J ( E R / ) exp (2168sin C v ) GIS [18 D b ; J ] GIS 1 ; E R G P 0125 mm E R = log I I ; S C M 5 ; ; C v L = P G M S C e 2) GIS D r = Er D r ; E r E r = GIS 0101 ghasin g GIS H A 412 BP [19 ; ] 3 [20 ] SHE ( Systeme [21 ] Hydrologique Europeen) SHE BP BP [16 ] D n = K r F w (1 - C g ) [ (1 - C c ) ( M r + M d ) ] D n ; K r ; F w ; C g 5 ; C c ; M r ; M d 1) D f = K f [ ( T/ T c - 1) ] D f ; K f ; T ; T c 2) Tsinghua Tongfang Optical Disc Co. Ltd. All rights reserved.

4 1 55 national soil erosion research laboratory. West Lafayette Morgan R P C Quinton J N Smith R E et al. The European soil erosion model ( EUROSEM) a dynamic approach for pre2 dicting sediment transport from fields and small catchments. Earth Surface Processes and landforms 1998(23) Yang C T. Unit stream power and sediment transport. Journal of the Hydraulics Division ASAE 98( HY10) Rroc Paper ) 9 Beasley D B. ANSWERS A model for watershed planning. Transactions of the ASAE 1980(23) km 2 10 Huggins L F Monke E J. The mathematical simulation of the hydrology of small watersheds. Technical Report Water Re2 sources Research Center Purdue University 1966(1) Beasley D B Huggins L F Monke E J. ANSWERS a model for watershed planning. Transactions of the ASAE (4) Park S W. Soil erosion simulation on small watersheds A modified ANSWERS model. Transactions of the ASAE 1982 (25) (1) Baffalt C Nearing M A Nicks A D. Impact of GLIGEN pa2 1 Wischmeier W H Smith D D. Predicting rainfall erosion loss2 rameters on WEPP predicted average soil loss. Transactions of es. USDA Agricultural Handbook the ASAE (2) Renard K G foster G R Weesies G A et al. RUSLE a guide 17 De Roo A P J. The LISEM Project an introduction. Hydrolog2 to conservation planning with the revised universal soil loss ical Processes 1996(10) equation. USDA Agricultural Handbook GIS (1) (1) 18 ( 1 ) Laflen J M Lwonard J L Foster G R. WEPP a new generation of erosion prediction technology. Journal of Soil and Water Cons (1) Foster G R Lane L J. User requirements USDA2water erosion prediction project ( WEPP). NSERL report No. 1 USDA2ARS (2) (1) BP (1) Tsinghua Tongfang Optical Disc Co. Ltd. All rights reserved.

5 Science of Soil and Water Conservation Vol. 2 No. 1 Mar ( ; ) GIS ; ; [1 ] ; ; Overvie w on Soil Erosion Model Research Zhou Zhengchao Shangguan Zhouping (State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Institute of Soil and Water Conservation Chinese Academy of Sciences Yangling Shaanxi China) Abstract In recent years the researchers did many studies on the process of water erosion and simulation. Based on the different study object and purpose a lot of empirical models physical process models and distributed models have been built up. This paper summarize the main soil erosion models in home and abroad and discuss the last development of the studies on soil erosion model which integrated with the GIS technologies and BP nerve network theories. Accord2 ing to the model s development and application some problems to be solved urgently are raised and more the tentative plan of the study on soil erosion model in home is also pointed out. Key words soil erosion ; model ; prediction ; parameter (CXIOG A ) ; ( ) ( KZCX ) (1974 ) E2mail com Tsinghua Tongfang Optical Disc Co. Ltd. All rights reserved.

DEVELOPMENT OF WEB-BASED GIS INTERFACES FOR APPLICATION OF THE WEPP MODEL

DEVELOPMENT OF WEB-BASED GIS INTERFACES FOR APPLICATION OF THE WEPP MODEL D.C. Flanagan A, J.R. Frankenberger A, C.S. Renschler B and B.A. Engel C A National Soil Erosion Research Laboratory, USDA-ARS,