Optimasi Sumber Daya Air Di Sub DAS Air Betung, Kota Pagar Alam Sumatera Selatan

Abstract

Currently, the water balance in the Air Betung Sub-watershed has decreased in quality/quantity due to the development of urban areas and increased economic activity, so that water allocation must be fair and equitable. The research objective is to optimize water resources to compliance domestic, industrial, and irrigation water needs. The analysis method uses the QM for Windows linear program application. From simulation and optimization were obtained, the availability of water was only able to supply irrigation water by 50.99% in 2019 and 61.22% in 2028. From the results of implementing five crop schedules and integrating plant types in each MT on irrigated land with limited water volume, the optimal profit is Rp. 17,606,110,000. Initial planting began on October 15 with the optimum area of MT-I (Paddy 1,211 ha -Palawija 0 ha), MT-II (Paddy 1,211 ha -Palawija 0 ha), and MT-III (Paddy 692 ha -Palawija 519 ha).Kata kunci: indeks kekritisan air, optimasi SDA, program linier, alokasi air. AbstrakSaat ini, keseimbangan air di Sub DAS Air Betung telah mengalami penurunan kualitas/ kuantitas sebagai dampak berkembangannya wilayah perkotaan dan meningkatnya kegiatan perekonomian sehingga pengalokasian air harus adil dan merata. Tujuan penelitian adalah mengoptimalkan SDA untuk memenuhi kebutuhan air domestik, industri, dan irigasi. Metode analisis menggunakan aplikasi program linier QM for Windows. Hasil simulasi dan optimasi diperoleh, ketersediaan air hanya mampu menyuplai air kelahan irigasi sebesar 50,99 % ditahun 2019 dan 61,22 % ditahun 2028. Dari hasil menerapkan lima jadwal tanaman dan memadukan jenis tanaman di masing-masing MT pada lahan irigasi dengan volume air terbatas diperoleh keuntungan optimal sebesar Rp. 17.606.110.000. Awal tanam dimulai 15 Oktober dengan luas optimum MT-I

Analysis of Risk Level Mapping of Flash Flood in the Air Betung Sub-Watershed, Pagar Alam City, Indonesia

“…This research was conducted in the Air Betung Sub-watershed, Pagar Alam City, consisting of 5 sub-districts, namely Pagar Alam Selatan, Pagar Alam Utara, Dempo Tengah, Pajar Bulan, and Sukamerindu Sub-districts [8].…”