[Utilization of spatial ANSWERS distribution model for observation landscape changes through hydrographic systems; rainfall runoff and sediment]
1996
Ilyas, M.A. | Effendy, R. (Pusat Penelitian dan Pengembangan Pengairan, Bandung (Indonesia))
For many years, attempts at modelling the complex processes by which a catchment converts rainfall to runoff were largerly concerned with using lumped parameter. More recent research has been reviewed and oriented towards the physically-based modelling approach. A new research trend is now evident which reflects the desire to gain a more fundamental understanding of causal mechanisms within the rainfall runoff process. The way in which storm rainfall reaching the ground surface causes a response in the flow of a river is fascinating but most difficult area of studying. The emergence of the geomorphological which could explain the influence of the factors such as basin topography, basin scale and stream network geometry on runoff production. Allied to this work has been development of models of rainfall fields in space and time. The motivation to develop distributed models is come from the perception that conventional rainfall-runoff models were in appropriate to many pressing hydrological problems, notably those related to the impact of man's activities on the flow, water quality and sediment transport regimes of river basin. Experience with ANSWERS models applications in agricultural and forested catchments will then be presented and discussed, including some management and planning will be indicated through adjusment of some parameter values. Effects of forest conversion will also be evaluated with cases in Cikapundung sub-catchment in river basin of Citarum in zone of North Bandung City (West Java). This new fundamentalist trend in hydrological systems modelling holds exciting prospects for the simulation
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