Journal article

Publication year: 1999

Pages: 297-301

Journal: Physics and chemistry of the earth. B: Hydrology, oceans and atmosphere

Volume number: 24

Issue number: 4

ISSN: 1464-1909

DOI Link: https://doi.org/10.1016/S1464-1909(99)00003-9

Publisher: Pergamon

Abstract: 
Until recently, no suitable computer model was available to quantify P and N yields of nonpoint sources into surface water in Central German watersheds. The event-based erosion and nutrient transport model AGNPS (Version 3.65), developed in the USA, was adapted to Central German landscape conditions and linked to a GIS. Drawing on a two-year program of water quality measurements and on hydrologic data collected over 33 years, this modified model was tested in two medium-sized agricultural watersheds in the state of Hesse (Germany). With deviations of 1.7% and 3.8%, runoff volumes for all observed and simulated flood events showed a high level of agreement in both watersheds. Only for one of the two watersheds were sediment and total phosphorus yield computed satisfactorily, with average errors of 5% (sediment) and 6% (total P). However, the model correctly registered the overall dynamics of the system as well as the differences of sediment and total P yield between the two watersheds. The modified AGNPS model can thus be employed by environmental agencies as a useful planning tool. (C) 1999 Elsevier Science Ltd. All rights reserved.

Harvard Citation style: Rode, M. and Frede, H. (1999) Testing AGNPS for soil erosion and water quality modelling in agricultural catchments in Hesse (Germany), PHYSICS AND CHEMISTRY OF THE EARTH PART B-HYDROLOGY OCEANS AND ATMOSPHERE, 24(4), pp. 297-301. https://doi.org/10.1016/S1464-1909(99)00003-9

APA Citation style: Rode, M., & Frede, H. (1999). Testing AGNPS for soil erosion and water quality modelling in agricultural catchments in Hesse (Germany). PHYSICS AND CHEMISTRY OF THE EARTH PART B-HYDROLOGY OCEANS AND ATMOSPHERE. 24(4), 297-301. https://doi.org/10.1016/S1464-1909(99)00003-9