ATIN, ENDAH SARI (2018) KAJIAN NERACA AIR DAN RESAPAN AIR DI SUB DAS OPAK HULU. Other thesis, UPN "Veteran" Yogyakarta.
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Abstract
ABSTRAK Air adalah sumber daya alam yang dapat dijumpai dimanapun dan dapat diperbarui. Ketersediaan air sebagai kebutuhan manusia, hewan dan tumbuhan menjadi hal pokok, walaupun keberadaan tersedianya air terbatas oleh keadaan geografis dan musim. Kebutuhan air semakin meningkat seiring dengan peningkatan jumlah penduduk, sehingga terjadi perubahan dalam siklus hidrologi suatu wilayah, sebaran air tidak merata dan menurunnya tingkat mutu air. Daerah Aliran Sungai (DAS) Opak merupakan daerah yang mengalami permasalahan terutama sumber daya air disebabkan oleh pengelolaan lahan yang kurang baik sehingga daerah yang seharusnya sebagai resapan air dialihfungsikan dan air yang jatuh ke bumi tidak dapat meresap secara baik kedalam tanah sebagai infiltrasi sehingga terjadi run off. Tujuan dari penelitian ini adalah untuk mengkaji kesetimbangan air atau neraca air dan resapan air di daerah Sub DAS Opak Hulu. Penelitian ini dilaksanakan di Sub DAS Opak Hulu, Kabupaten Sleman. Infiltrasi di Sub DAS Opak Hulu berkisar antara 206,41 mm/bulan sampai dengan -257,54 mm/bulan. Dari hasil infiltrasi didapat analisis neraca air yaitu surplus dan defisit. Surplus terjadi pada bulan November sampai Januari dan April,sedangkandefisitterjadipadabulanFebruari, Maret,MeidanOktober. Kapasitas infiltrasi konstan lahan sawah ialah 6 cm/jam, kapasitas infiltrasi konstan lahan pemukiman ialah 3 cm/jam, kapasitas infiltrasi konstan lahan kebunialah6cm/jamdankapasitas infiltrasikonstanlahansemakialah9cm/jam. Dari hasil pengukuran infiltrasi daerah potensial sebagai tempat resapan yang baikialahsemak,kebundansawah. KataKunci:Neracaair,ResapanAirdanDaerahTangkapan ABSTRACT Water is a natural resource which can be found in everywhere and can be regenerated. The water availability is a crucial requirement for human, animal, and plant, although the availability of water is limited by geographical condition and seasons. The increasing of water demand and population made changes in so many aspects such as, hydrology cycle, uneven water distribution and declining water quality level. Opak River Basin is an area that experiencing so many problems especially water resource, which effected by poor land management. The space that supposed to be water catchment area has converted to different function, and the water that supposed to fall into the ground couldn’t be absorbed well, so the run off happened. The purpose of this research was to examine the water balance and water infiltration in Opak Hulu Sub River Basin. The study was held in Opak Hulu Sub River Basin, Sleman. The infiltration range in this area start from 206,41 mm/month to -257,54 mm/month. The infiltration result showed surplus and deficit in water balance analysis. Surplus condition occurred in November until January, also in April. Meanwhile, the deficit condition occurred in February, March, May and October. The capacity of constant infiltration in paddy field was 6 cm/hour, the capacity of constant infiltration in resident area was 3 cm/hour, the capacity of constant infiltration in plantation area was 6 cm/hour, and the capacity of constant infiltration in bushes was 9 cm/hour. The result of this study showed that the potential area for water catchment are bushes, plantation, and paddy field areas. Keyword : Water Balance, Infiltration, and Catchment Area
| Item Type: | Thesis (Other) |
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| Subjects: | S Agriculture > S Agriculture (General) |
| Divisions: | Faculty of Engineering, Science and Mathematics > School of Civil Engineering and the Environment |
| Depositing User: | Ratna Sufiatin |
| Date Deposited: | 21 Jan 2019 02:43 |
| Last Modified: | 21 Jan 2019 02:43 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/18065 |
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