ANALISIS TINGKAT KEPARAHAN KEKERINGAN DAN UPAYA MITIGASI BENCANA HIDROLOGIS DI SUB DAS KRUENG JREUE ACEH BESAR

Abstract

Drought is an act of nature most powerful on the availability of the water supply, both necessary for the benefit of agricultural and to human need.There are three phases of analysis to research the severity of this drought: (1) To identify station rainfall in the study areas. Monthly data precipitation using rain observation data ( 2005-2014) from 2 stations in Indrapuri and Jantho; (2) Analysis was conducted rainfall to get the drought meteorology of each station precipitation with the gauge standardized precipitation index ( SPI ); and (3) Analysis was conducted spline interpolate method index value dryness of each rainfall station to get scatter drought.The analysis by using the 3 monthly scale SPI method (SPI-3), The rainfall in 2005-2014 year had not a very dry because rainfall for 12 months from January until December for that 10 years, only on June-July-August (JJA) experienced dry conditions with the drought index averange among -0,80 until -1,00. The rest months September- October-November (SON), Desember-January-February (DJF) and March-April-May (MAM) in normal condition, with the -0,99-0,99 value range of the SPI.The hidrologis disaster mitigation may be done by structural (optimalize the development of the Krueng Jreue dam, rehabilitation and irrigation maintenance. Storage excess water in the rainy season for use in the dry season), and non structural (non structural to predict drought, reforestation, planting plant water saving, the use of mulch and organic matter)