October 2.9, 1.9.99 and accepted l\lmjemher 5. 1.9.9.9)The land usc developmenT.on the cat.chment area havt:" \.0 consider the sustainability of the natural resources, particularly wat.er and soil fertility.Therefore, the risks of land use rif:vrlopmf'nt.must.hr minimizcd This p[lper presents a methodology and analysis of the bnd use risks on sediment yield trom a catchment area and propose some suggestions to maintain the catchment area function.The lIniversal soil los::; equation (USLE) in combination with IDRISI sofhvare pac:kagp ,"vas llSpd in this study.Five thematic maps of USLE parameLers; rainfall erosivity (R), soil erodibilily facl.or(K), Icngth-slope-steepness factor (LS), land Ilse rador e.C), and conservation fact.or(P) Vi;ere constructed by digitizing t.hem on comput.erdata hase with an element.::;ize of 200 X 200 III The spatial and temporal changes on cat.chment area (land usc and sedimem yield) \vere obtained by comparing two set of maps from different JJl'rluu.The propuseu method is Clpplir'd al. WOLlogiri caLduneni.area ill Indonesia.Prom this st.uciy, it was founci that there are significanl risks of t.he land usc on the sediment.yields and the existing land usc have to be modified to reduce t.he sediment yields.
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