Penelitian ini bertujuan untuk mengetahui kebutuhan air untuk penduduk dan irigasi di Desa Nguter. Selain itu, penelitian ini dilakukan untuk mengetahui potensi mata air Semeru untuk pemenuhan kebutuhan air bagi penduduk dan irigasi. Metode yang digunakan dalam penelitian ini adalah survey meliputi pengukuran kuantitas mata air dengan menggunakan metode WEIR, pengukuran kualitas air, kebutuhan air penduduk dilakukan wawancara, serta kebutuhan irigasi dianalisis menggunakan software cropwat 8.0. Berdasarkan hasil penelitian diperoleh hasil debit rata-rata mata air Semeru yaitu sebesar 1.564.973,28 liter/hari. Dari segi kualitas mata air Semeru termasuk kedalam kategori layak untuk disuplai kepada penduduk maupun irigasi. Rata-rata kebutuhan air penduduk Desa Nguter pada musim kemarau dan hujan yang 608.569,5 liter/hari. Secara kuantitas perbandingan debit mata air Semeru untuk kebutuhan air bersih penduduk sangat mencukupi dari masa sekarang atau 50 tahun kedepan. Selain itu, mata air Semeru memenuhi kebutuhan dalam jaringan irigasi Umengan.
The decreased rainfall in Indonesia is mainly influenced by the east monsoon so air pressure from the southern hemisphere which is dry will flow through Indonesia. In a relatively long time, this may cause drought condition on agricultural land in Indonesia in general and in Temanggung Regency in particular. In addition, ENSO (El Nino Southern Oscillation) contributed to the decreased rainfall in Indonesia. This phenomenon will be more intensive and extreme with the existence of global warming. The identification of vulnerability of agricultural drought is an effort to mitigate disasters. This study aims to determine the distribution of agricultural drought and determine the factors that influence agricultural drought in Temangung Regency. The research method used the Analytical Hierarchy Process (AHP) to build a model of agricultural drought vulnerability by considering several factors. The results showed that the area of agricultural land which is vulnerable and very vulnerable to drought is 86,2 km2 and 74,14 km2, while agricultural land with moderate vulnerability is 208,21 km2, and agricultural land which is not vulnerable and very not vulnerable to drought is 128,15 km2 and 267,33 km2. The main factor as a determinant of agricultural drought in Temanggung Regency is rainfall. Meanwhile, the next factor is the respective land cover and soil texture. This research concludes that the effect of slope is not a big impact on agricultural drought in Temanggung Regency.
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