Reklasifikasi Peta Penutupan Lahan untuk Meningkatkan Akurasi Kerentanan Lahan

Abstract

Land vulnerability is an important information to formulate land rehabilitation activities since it indicates the response of that particular land to erosion. It was determined by several factors such as slope, soil types, rainfall, and land cover. The land cover could be managed to maintain the land vulnerability. Inaccuracies of land cover classification would produce different vulnerabilities, which can cause miscalculation in land rehabilitation planning and implementation. This research is to adjust the existing land cover classification in order to detect land vulnerabilities. The analysis is done by comparing the classification of the existing land cover map with land cover criteria for land vulnerability analysis. The classification result then overlayed with land system map to determine the land vulnerability. The result of a study in Cisadane watershed shows that inaccuracy in determining unirrigated farming into shrub land or moor/open field could affect the shifting of vulnerable class to very vulnerable. Differences in determining plantations and unplanted estate areas with open field could also raise the extent of land vulnerability to 12.3%. Settlement in an urban area that turned into buildings would reduce the level of land vulnerability to 2.1%. Buildings could reduce the land vulnerability due to the impermeable layer would decrease erosion. However, from the hydrological point of view, the impermeable layers would increase the hydrological vulnerability due to the increased runoff and reduced ability to absorb water. Land cover data selection as input to determine the land vulnerability is very important and sensitive. For that reason, in the Cisadane Watershed, dryland farming should be classified as open field and settlement in urban areas should classify as buildings.

Tipologi Daerah Aliran Sungai Untuk Mitigasi Bencana Banjir Di Daerah Aliran Sungai Musi

“…, 2012 andBasuki &Putro, 2013) Masing-masing jenis penutupan lahan tersebut Gambar 4 kemudian diklasifikasikan menjadi dalam Tabel 4 mengacu pada Paimin et al (2012) untuk dasar dalam pemberian nilai (pembobotan). Klasifikasi dan pembobotan jenis penutupan lahan pertanian lahan kering bercampur semak (PLK campur semak) yang merupakan jenis penutupan paling dominan di DAS Musi perlu kehatihatian agar tidak menimbulkan kesalahan yang fatal seperti halnya hasil kajian Savitri & Pramono (2017). Sepintas bahwa jenis penutupan ini dapat diklasifikasi ke dalam kelompok nomor 4 (sawah, rumput, semak/ belukar) yang mempunyai nilai 3; atau nomor 6 (tegal, tanah berbatu) yang mempunyai nilai 5.…”

“…Kondisi penutupan lahan ini berbeda dengan kondisi jenis penutupan pertanian lahan kering (PLK) yaitu terkait dengan liputan vegetasinya, dimana PLK campur semak belukar berupa liputan vegetasi semi alami sedangkan PLK berupa murni artificial/ campur tangan manusia yang secara visual jelas berupa ladang/ tegalan (Direktur Jenderal Planologi Kehutanan, 2015;Badan Standardisasi Nasional, 2014). Berdasarkan hal tersebut maka jenis penutupan lahan PLK campur semak direklasifikasi (Savitri & Pramono, 2017) untuk memisahkan area yang terindikasi sebagai area PLK dan sebagai area semak belukar.…”

Land use and environment physical condition on sedimentation and water discharge of lindu lake watershed

“…Shrubs and bushes are an area of dry land which has been overgrown with various heterogeneous and homogeneous natural vegetation which its density is rare until dense (BSN, 2010). In Indonesia, generally, shrubs is a former forest area that does not show any trace of trees cutting down (Savitri & Pramono, 2017). Generally, shrubs also an unproductive area and was abandoned by farmers.…”

Pengembangan Sungai Tematik Di Desa Pendem Kecamatan Junrejo Kota Batu

“…Satu hal penting dari lingkungan alamiah yang terdapat di dalam lingkungan desa adalah lingkungan sungai. Lingkungan sungai akan mempunyai dampak negatif yang diakibatkan oleh kegiatan desa, seperti: okupasi dan reduksi dari dataran banjir, polusi pada tubuh air dan tanah, kehilangan keanekaragaman, intensifikasi dan ekstensifikasi lahan pertanian, komplektivitas manajemen air, dan sebagainya (Savitri & Pramono, 2017). Dampak tersebut mempunyai pengaruh negatif terhadap kesehatan manusia, keseimbangan ekologi kota dan citra kota, yang memberikan konstribusi potensial pada lingkungan sungai terhadap kota yang akan menimbulkan pengaruh negatif (Ruspendi, Hadi, & Rusdiana, 2013).…”