KAJIAN POTENSI AIR DALAM MEMENUHI KEBUTUHAN AIR RUMAH TANGGA DI HARGOBINANGUN PAKEM SLEMAN YOGYAKARTA
SANTI HANAFI, Ir. Sri Astuti Soedjoko
2008 | Skripsi | S1 KEHUTANANAir merupakan sumber daya yang sangat penting bagi kehidupan semua makhluk di bumi. Air, manusia dan vegetasi merupakan suatu kesatuan yang membentuk hubungan timbal balik dalam sistem hidrologi. Manusia membutuhkan air untuk memenuhi kebutuhan hidupnya. Laju konversi lahan khususnya di daerah tangkapan air (recharge area) berupa alih fungsi kawasan hutan dapat mengancam keberadaan dan kelestarian sumber daya air. Penelitian ini bertujuan untuk menghitung debit air, mengetahui kualitas air, mengetahui kcbutuhan konsumsi air rumah tangga dan mengetahui imbangan antara potensi air yung tersedia dengan laju pertumbuhan penduduk di Desa Hargobinangun. Pengambilan data potensi air dilakukan dengan metode volumetrik. Kualitas fisik dun kimia air diketahui dengan cnra pcngambilan sumpcl air untuk dianalisis di laboratorium, kemudian dibandingkan dengan persyaratan kualitas air yang berlaku untuk menganalisis kelayakan air. Kebutuhan air rumah tangga dilakukan dengan menghitung jumlah kebutuhan air berdasarkan data kuisioner konsumsi air di Desa Hargobinangun. Analisis vegetasi dilakukan dengan menggunakan petak ukur Nested Sampling berukuran 20mx20m. Nilai INP (lndeks Nilai Penting) digunakan untuk mengetahui jenis-jenis vegetasi penyusun hutan di daerah penelitian. Berdasarkan hasil penelitian di dapatkan bahwa debit air di Tlogo Muncar sebesar 0,4916 1/detik, Tlogo Putri sebesar 1,6721 1/detik, Tanen sebesar 1,2009 1/detik, Randu I sebesar 1,3020 1/detik, Randu II sebesar 1,78471/detik, Purworejo sebesar 0,4048 1/detik, dan Jetisan sebesar 1,15301/detik. Jumlah total debit air di Desa Hargobinangun sebesar 8,0091 1/detik. Kualitas fisik (temperatur, bau, rasa, warna dan kekeruhan) dan kualitas kimia (pH, Fe, Mn, CaCO3, Na, NO3, NO2, dan Cl) dari semua mata air di Desa Hargobinangun memenuhi Persyaratan Kualitas Air Minum berdasarkan Keputusan Menteri Kesehatan RI No. 907/Menkes/Sk/Vll/2002. Jumlah kebutuhan air rumah tangga penduduk di Desa Hargobinangun yaitu 66,08 l liter/orang/hari. Keseimbangan antara ketersedian dan kebutuhan air termasuk kedalam katagori kritis dengan angka perbandingan sebesar 70,49 %.
Water is a very important resource for life of all creatures in on the earth. Water, human being, and vegetation are a unity that shape mutual relationship in hydrology system. Human being needs water to meet their living need. Rate of forest conservation, particularly ln recharge area ln tbrm ot' functional change of forest area can threat existence and conservation of water resources. This research had objective to calculate water now rate, water quality, needs of household consumption and balance between water potential and population growth in Hargobinangun village. Data on water potential was taken with volumetric method. Physical and chemical quality was identified by taking sample of water to be analyzed in laboratory. Then the result was compared with existed requirement of water quality to determine water expediency. Household need of water was determined by calculating amount of water need based on data of water consumption questioner in Hargobinangun village. Vegetation analysis was done using Nested sampling measure block with 20m x 2m width. Importance value index was used to identify type of vegetations forming forest in research area. Result of the research indicated that water flow rate in Tlogo Muncar, Tlogo Putri, Tanen, Randu I, Randu II, Purworejo, and Jetisan were 0.4916 1/s, 1.5721 1/s. 1.2009 1/s, 1.3020 1/s, 1.7847 1/s, 0.4048 1/s and 1.1530 1/s, respectively. Total water flow rate in Hargobinangun village was 8.0091 1/s. Physical quality (temperature, smell, taste, colour and turbidity) and chemical quality (pH, Fe, Mn, CaCO3, Na, NO3, NO2 and Cl) of all water springs in Hargobinangun villages met Quality requirement of drink water according to Decree of Health Minister No. 907/Menkes/SK/ VII/2002. Amount of household need of water tn Hargobinangun village was 66.081 liter/person/day. Balance between water availability and water needs was critical with ratio of 70.49%.
Kata Kunci : air, mata air, kebutuhan air, potensi air.
