AHMADI, WILLI (2013) POTENSI AIR TANAH BEBAS DI KECAMATAN DEPOK KABUPATEN SLEMAN DAERAH ISTIMEWA YOGYAKARTA. Other thesis, UPN "VBETERAN" YOGYAKARTA.
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Abstract
Kecamatan Depok termasuk wilayah salah satu Kecamatan yang ada di
Kabupaten Sleman. Di daerah penelitian airtanah masih merupakan sumber utama air
untuk rumah tangga, rumah makan, hotel, kantor, sekolah maupun kampus. Oleh
karena itu ketersediaan sumber air tersebut untuk jangka panjang perlu dilestarikan,
terutama air tanah yang dipandang sebagai salah satu sumber air yang relatif mudah
dan murah cara mendapatkannya.
Curah hujan maksimum di daerah penelitian 2889 mm/tahun dan curah hujan
minimum 1537 mm/thn, curah hujan rata-rata 2028 mm/tahun, Tempratur udara ratarata
bulan terendah daerah penelitian adalah 22.87 oC jatuh pada bulan Juli dan
temperatur udara rata-rata tertinggi adalah 24,59 oC jatuh pada bulan Oktober.
Pengukuran sumur gali tempat penduduk meliputi pengukuran tinggi Muka
Air Tanah (MAT) 30 titik sumur dengan menggunakan alat pizometer, menggunakan
Total Dissolved Solid (TDS-Meter), menggunakan Daya Hantar Listrik (DHL),
menggunakan EC Meter, dan pH menggunakan kertas lakmus kimia. Hasil
pengukuran diketahui bahwa ketinggian muka air tanah berkisar antara 4,5 – 14,6 m,
TDS: 40 - 270 mg/l, DHL: 49 μ mhos/cm sampai 404 μ mhos/cm, Suhu: 27,7ºC
sampai 35,6ºC, dan pH: 7,0 sampai 8,0. Hasil pengolahan muka air tanah yang dibuat
dengan program autoCAD, terdapat aliran air tanah di daerah penelitian, yaitu :
1. Aliran airtanah dari Utara menuju Selatan
Gradien Hidrolik di daerah penelitian adalah 0,021. Debit aliran air tanah sebesar
25.05 liter/detik.
Hasil perhitungan neraca air dari tahun 2003 s.d 2012 diperoleh imbuhan air
tanah bebas (ΔS) di daerah penelitian yaitu berkisar antara 32,03 – 2.216,99
mm/tahun.
Hasil kajian kualitas air PDAM Sleman di Depok dan CondongCatur terdapat
beberapa conto air yang menunjukkan kandungan unsur-unsur kimia yang melebihi
batas maksimum yang ditetapkan, seperti :
1. Sample (Jerigen 1) : Memenuhi syarat dan tidak melebihi dari standart parameter
yang ditetapkan
2. Sample (Jerigen 2) : Memenuhi syarat dan tidak melebihi dari standart parameter
yang ditetapkan
3. Sample (Jerigen 3) : Sampel nomor 2 memiliki kandungan senyawa kimia
Kekeruhan (Turbidity), Besi, Khlorida melebihi batas maksimum.
Depok subsdistrict is one of the district areas in Sleman regency. In the
research area, groundwater represents the single source of fresh water for
households, restaurants, hotels, offices, and schools, as well as colleges. Therefore,
the long-term availability of water resources should be preserved, especially the
groundwater that is generally seen as a freshwater source that is relatively cheaper
and easier to access.
The maximum and minimum rainfall in the study area is 2889 and 1537
mm/year, respectively; constituting the average annual precipitation rate of 2028
mm. The July average lowest air temperature in the study area is 22.87o C, and the
October average highest air temperature is 24.59o C.
The measurement of local people-owned dug wells includes that of ground
water level of 30 wellsites using piezometer, total dissolved solid (TDS) meter,
electrical conductivity (EC), EC meter, and litmus paper to determine the pH. The
measurement indicates that the groundwater level ranges from 4.5 to 14.6 m, TDS
from 40 to 270 mg/l, EC from 49 μ mhos/cm to 404 μ mhos/cm, temperature at
27,7ºC to 35,6ºC, and pH of 7,0 to 8,0. Ground Water Level data processing
conducted using autoCAD indicates groundwater flow in the researched area; that is
the groundwater flow from southern to northern area. Hydraulic gradient in the
research area was 0,021, with groundwater discharge at 25.05 liters / sec.
Water balance calculation from 2003 to 2012 indicated that recharge rate of
free groundwater (ΔS) in the study area ranged from 33.03 to 2216.99 mm/year.
Assessment of PDAM water quality in Depok Sleman and Condongcatur
produced samples indicating the chemical elements content that exceed the
predetermined maximum limit, as follows:
1. Sample (Jerrycan 1): eligible and does not exceed the established parameter.
2. Sample (Jerrycan 2) : eligible and does not exceed the established parameter.
3. Sample (Jerrycan 3): Sample number 2 contains chemical compounds,
Turbidity, Iron, and Chloride that exceeds the maximum limit.
| Item Type: | Thesis (Other) |
|---|---|
| Subjek: | T Technology > TN Mining engineering. Metallurgy |
| Divisions: | x. Faculty of Engineering, Science and Mathematics > School of Engineering Sciences |
| Depositing User: | Darsini Darsini |
| Date Deposited: | 23 May 2016 04:28 |
| Last Modified: | 23 May 2016 04:28 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/2098 |
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