PENGARUH EROSI TERHADAP PRODUKTIVITAS LAHAN DAS WALIKAN KABUPATEN KARANGANYAR DAN WONOGIRI TAHUN 2012

ABSTRAKPurpose of this research was (1) Determine the erosion in the watershed Walikan 2012.(2) To know the land productivity in the Watershed Walikan 2012. (3) To know theeffect of erosion on land productivity in Watershed Walikan 2012. This research usedquantitative – descriptive analysis method. The results show that the greatest class inthe watershed Walikan is very low class which has area of 5143.83 hectares or 91.86%,while the greatest land productivity class is high land productivity class which has areaof 1808.32 hectares or 55.69%. The influence of erosion on land productivity is -0.529which has mean moderate level, with negative correlation form. If there was ten-folderosion increasing, the land productivity was reduce to Rp 3.382.818,00 as well as ifthere was ten-fold erosion decrease, the productivity would increase byRp 3.382.818,00; the erosion give 27,9% as contribution major contribution influencingland productivity.Kata Kunci : Erosi, Satuan Lahan, Produktivitas, Pengaru