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Abdul Jalil
Balai Pengelolaan DAS dan Hutan Lindung Sampara

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ANALISIS TINGKAT BAHAYA EROSI DAN LAHAN KRITIS DI DAERAH ALIRAN SUNGAI RORAYA PROVINSI SULAWESI TENGGARA La Baco S. La Baco S.; Umar Ode Hasani; Kahirun Kahirun; Abdul Jalil
Jurnal Ecogreen Vol 4, No 1 (2018)
Publisher : Universitas Haluoleo

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Abstract

ABSTRACTThe degree of erosion hazardand critical land has a link to affect soil conditions. Lands that have a heavy erosion rate tend to be critical which is characterized by low soil productivity. The purpose of this study was to analyze the degree of erosion hazard and critical land in the Roraya watershed. This research was conducted using survey method for primary and secondary datacollection. The results showed that soil erosion rates in the Roraya watershed were dominated by moderate erosion rates (15 - 59 ton/ha/year) and heavy erosion rates (180 - 460 ton/ha/year) of 48,295.10 hectares (33 , 17%) and 37,362.89 hectares (25.66% of the total area of the Roraya watershed). The critical land area in the Roraya watershed is 48,348.06 hectares or 33.21%, while the most critical land area is 1,504.58 hectares or 1.03% of the total area of the Roraya watershed. Keywords: erosion hazard, critical land, Roraya Watershed ABSTRAKTingkat bahaya erosi dan lahan kritis mempunyai keterkaitan untuk mempengaruhi kondisi tanah.  Tanah-tanah yang mempunyai tingkat erosi berat cenderung akan menjadi kritis yang dicirikan oleh produktivitas tanah rendah.  Tujuan penelitian ini adalah untuk menganalisis tingkat bahaya erosi dan lahan kritis di DAS Roraya.  Penelitian ini dilakukan menggunakan metode survei untuk pengambilan data primer dan data sekunder.  Hasil penelitian menunjukkan bahwa tingkat erosi tanah di DAS Roraya didominasi oleh tingkat erosi sedang (15 – 59 ton/ha/tahun) dan tingkat erosi berat (180 – 460 ton/ha/tahun)  masing-masing seluas seluas 48.295,10 hektar (33,17 %) dan 37.362,89 hektar (25,66 % dari total luas DAS Roraya). Luas lahan yang tergolong kritis di DAS Roraya adalah seluas 48.348,06hektaratau 33,21 %,sedangkan luas lahan sangat kritis adalah 1.504,58hektar atau 1,03 % dari total luas DAS Roraya. Kata Kunci: bahaya erosi, lahan kritis, Daerah Aliran Sungai Roraya
ANALISIS KETERSEDIAAN DAN KEBUTUHAN AIR DI DAERAH ALIRAN SUNGAI RORAYA PROVINSI SULAWESI TENGGARA La Baco S.; Kahirun Kahirun; Umar Ode Hasani; Abdul Jalil
Jurnal Ecogreen Vol 3, No 1 (2017)
Publisher : Universitas Haluoleo

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The recent phenomenon associated with the existence of water resources is a decrease in water supply while water demand continues to increase over time which is a logical consequence of population growth and increased economic activity. The purpose of this study was to analyze the availability and demand of water in the Roraya watershed. The research method used is the collection and analysis of secondary data. The results showed that water supply in the Roraya watershed was 3.75 m3/sec or 324,000 m3/day. The total water demand is 326,897 m3/day which is the cumulative value of domestic water demand of 16,316 m3/day, the demand of non domestic water is 3,263 m3/day, the need of irrigation water is 283,738 m3/day and the industrial water demand is 23,580 m3/day. Most of the water demand in the Roraya watershed is irrigation water of 86.6% of the total water demand in the Roraya watershed, while the domestic water demand in the Roraya watershed is about 5.0%. Industrial water demand in the Roraya watershed reached 7.2%, while non-domestic water demand only reached 1% of the total water demand in the Roraya watershed. The balance of water supply and demand in the Roraya watershed shows that every day there will be a water deficit of 2,897 m3/day. Key Words: Water Supply, Water Demand