WATER MANAGEMENT FOR PEAT SWAMP REHABILITATION IN SEI AHAS, CENTRAL KALIMANTAN, INDONESIA
DOI:
https://doi.org/10.32679/jth.v6i1.507Keywords:
Manajemen air, rehabilitasi rawa gambut, budaya tanam, Duflow, ModflowAbstract
Di Kalimantan Tengah, pembangunan jaringan saluran secara besar-besaran dan sangat kompleks menyebabkan kerusakan dan degradasi yang intensif terhadap kondisi gambut dan rawa gambut yang ditandai dengan perubahan tutupan lahan, penurunan muka air tanah, kebakaran, beberapa bencana kekeringan, penurunan tanah, dan lain sebagainya. Salah satu langkah untuk mengatasi kondisi tersebut adalah dengan mengatur kondisi hidrologi di area tersebut. Duflow digunakan untuk mensimulasi tinggi muka air di saluran dan Modflow digunakan untuk mencari distribusi dan karakteristik dari muka air tanah di lapangan. Berdasarkan simulasi dari 2 model tersebut, kondisi eksisting (musim kering), area studi mengalami kekeringan karena muka air tanah turun lebih dari 1 m dibawah permukaan tanah. Hasil yang diperoleh, usaha untuk merehabilitasi rawa gambut dengan mengatur muka air tanah mendekati elevasi permukaan tanah melalui 2 skenario (canal blocking and pemasangan bendung bertingkat) di musim kering tidak sepenuhnya menyelesaikan semua masalah di area itu. Meskipun hasilnya akan berbeda, jika itu disimulasikan di musim basah ketika pengaruh air hujan dimasukkan ke dalam perhitungan, beberapa langkah lain seharusnya di diterapkan seperti pendekatan manajemen air lainnya dan program silvikultur. Dalam pendekatan silvikultur, beberapa teknik dan prosedur seharusnya dilakukan untuk meningkatkan kualitas dan kuantitas tutupan lahan guna mendukung fungsi hidrologi secara alamiah. Penanaman kembali secara intensif semestinya dilakukan di lapangan melalui sistem jalur. Jadi, dengan 2 pendekatan yang terintegrasi tersebut, tingkat kesuksesan dalam rehabilitasi rawa gambut akan dapat dioptimalkan.References
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