Pengaruh Hutan Dalam Pengaturan Tata Air Dan Proses Sedimentasi Daerah Aliran Sungai (Das) : Studi Kasus Di Das Cisadane

Abstract

Forest function to arrange river stream, for stream flow and sediment flow, had a longer attention. The hydrologic expert have a notion that forest function to arrange stream flow and to arrange sediment flow only behaved for watershed with small area (< 100 km 2), but dit not behave for watersheds having area > 100 km 2. Utilize to anticipate the previous research weakness, research studying of forest function for river stream and sedimentation process on watershed were executed on watershed with small area (< 100 km 2), medium area (100 km 2-500 km 2) and wide area (> 500 km 2). This research exploited SWAT hydrologi model. The research aim was to study the forest function to arrange the water system and to arrange the sedimentation processes that happened on watershed with a few areas without disregarding other land use. In watershed with wide area, forest existence did not benefit to arrange water system and to arrange sedimentation process. Forest existence benefited to arrange the water system and to arrange sedimentation process in watershed with medium area and narrow area.

Untitled

“…A class of very mild erosion generally dominated erosion in the Kalikonto watershed. Results of RUSLE erosion prediction model using pixelbased GIS applications (Figure 7) (Fitzpatrick et al, 1999;Wibowo, 2005;Murillo et al, 2011;Junaidi et al, 2011;Wijitkosum, 2012). This is because the vegetation of ground cover plays an important role in protecting surface soil from direct impact of rain water, as well as lowering the speed and volume of runoff water so it can withstand the soil particles.…”

Aplikasi Model MapDAS untuk Simulasi Karakteristik Hidrologi DAS Mikro yang Didominasi Perkebunan Sawit

“…Dampak dari perubahan tata guna lahan adalah degradasi lahan dan lingkungan. Degradasi lahan dapat mengakibatkan peningkatan aliran permukaan dan erosi di suatu Daerah Aliran Sungai (DAS) (Banuwa et al, 2008;Junaidi dan Tarigan, 2011;Tarigan, 2016). Perkebunan kelapa sawit sering dianggap menjadi penyebab keringnya sumber air dan peningkatan emisi karbon.…”

KARAKTERISTIK HIDROLOGI TANAH DI BAWAH TEGAKAN PINUS (Pinus merkusii), MERAWAN (Hopea odorata Roxb) DAN MAHONI UGANDA (Khaya anthoteca)

“…Kerusakan hutan yang terjadi dapat mempengaruhi fungsi hidrologi hutan, yakni sebagai pengatur tata air, menjaga iklim mikro, menjaga waktu penyebaran aliran air sungai dan mampu melindungi daerah di bawahnya dari berbagai bencana seperti banjir (Asdak, 1995;Junaidi dan Tarigan, 2011;Tarigan et al, 2016). Menurut data Kementerian Kehutanan (2013), sekitar 68.6% dari total luas daratan Indonesia merupakan kawasan hutan, sehingga menjadi salah satu potensi sumber daya alam sekaligus rawan terjadi kerusakan karena kepentingan manusia dalam memenuhi kebutuhan hidupnya.…”