Spatial model of land use change related to sediment yield (case study: Cipeles and Cilutung watershed, West Java)

4th International Symposium on LAPAN-IPB Satellite for Food Security and Environmental Monitoring

农业科学;生态环境科学

Wulandari, D.W.^1 ; Kusratmoko, E.^1 ; Indra, T.L.^1

Magister Program Departement of Geography, Faculty of Mathematics and Science, Universitas Indonesia, Depok

16424, Indonesia^1

关键词: Driving factors;    Hydrological functions;    Irrigated fields;    Land degradation;    Land-use change;    Model-based OPC;    Sediment yields;    Spatial modeling;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/149/1/012034/pdf
DOI  :  10.1088/1755-1315/149/1/012034

来源: IOP

【 摘 要 】

Land use changes (LUC) as a result of increasing human need for space are likely to destroy the hydrological function of the watershed, increase land degradation, stimulate erosion and drive the process of sedimentation. This study aimed to predict LUC during the period 1990 to 2030 in relation to sediment yield in Cilutung and Cipeles Watershed, West Java. LUC were simulated following the model of Cellular Automata-Marcov Chain, whereas land use composition in 2030 was predicted using Land Change Modeler on Idrisi Selva Software. Elevation, slope, distance from road, distance from river, and distance from settlement were selected as driving factors for LUC in this study. Erosion and sediment yield were predicted using WATEM/SEDEM model based on land use, rainfall, soil texture and topography. The results showed that the areas of forest and shrub have slightly declined up to 5% during the period 1990 to 2016, generally being converted into rice fields, settlements, non-irrigated fields and plantations. In addition, rice fields, settlements, and plantations were expected to substantially increase up to 50% in 2030. Furthermore, the study also revealed that erosion and sediment yield tend to increase every year. This is likely associated with LUC occurring in Cipeles and Cilutung Watershed.