Land use cover changes and water quality of Cipunten Agung Watershed Banten

Abstract

In general, the land and natural resources utilization of Cipunteng Agung Watershed could be classified into protected and cultivated region. Based on satellite imagery classification, protected region covers 885.76 ha (22.71%), while cultivated region occupied 3,041.69 ha (77.29%) in 2011. It means that the land use and covers change (LUCC) to be cultivated rapidly increase. Those conditions had impacted positively to the local economy development, however it had negatively degrades water quality in Ciputen Agung river. Therefore, the purpose of this research is to analyze LUCC impacts to the water quality (WQ) in Cipunten Agung watershed. Supervised classification method and Water Pollution Index (WPI) approach were correlated to define the optimal solution to reduce the rate of LUCC. The result shows that area of cultivation tree and paddy field are higher than others in midstream, and settlement is higher in downstream, particularly at riparian landscapes. The concentration of total phospate, nitrite, and nitrate which indicated from agriculture land were complies with WPI class 2 until 4 standart. The rate of LUCC of Cipunten Agung watershed and the density of settlement are potential to be the driving factor of water quality degradation. Regional planning with ecology approach was recommended for sustainable development of Cipunten Agung Wateshed.