KAJIAN KERENTANAN AIRTANAH BEBAS TERHADAP PENCEMARAN DI KAWASAN PESISIR PARANGTRITIS KABUPATEN BANTUL DAERAH ISTIMEWA YOGYAKARTA
| Main Authors: | , DHONI WICAKSONO, , Emilya Nurjani, S.Si., M.Si. |
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| Format: | Thesis NonPeerReviewed |
| Terbitan: |
[Yogyakarta] : Universitas Gadjah Mada
, 2013
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| Subjects: | |
| Online Access: |
https://repository.ugm.ac.id/122210/ http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=62309 |
Daftar Isi:
- Existence of human activities has the potential to contaminate water resources in coastal areas. Modeling of groundwater vulnerability based on Geographic Information System (GIS) can represent quickly groundwater potential on static vulnerability and dynamic vulnerability. The purpose of this research is to apply the model of groundwater vulnerability as an attempt to identify potential contamination based on the land physical condition, determined to the levels of phosphates and number of fecal coli as an indicator of contamination, to analyze the vulnerability of groundwater modeling results, knowing the dominant parameter in influencing vulnerability and to evaluate the results of the modeling phosphate levels and number of fecal coli that of the test wells. The research method using DRASTIC and Human Activity Impact (HAI). This method has a GIS-based system with weighting techniques and assessment (weighting and scoring). DRASTIC method represent static groundwater vulnerability, while the method of HAI represent the condition of dynamic groundwater vulnerability. The sample selection using systematic sampling method based on grid to guide groundwater depth parameters and purposive sampling method based on landused for groundwater sampling. Descriptive analysis for physical parameters of land and groundwater vulnerability mapping results. Multiple regression analysis was conducted to determine the dominant parameters for phosphate levels. Crosstab analysis and graphical models to compare vulnerability class to the number of fecal coli. Correlation analysis Kendal's tau-b and Spearman to know the correlation between groundwater vulnerability index and phosphate levels. The results show that the static groundwater vulnerability is dominated high level (54.42%), while the dynamic groundwater vulnerability is dominated by moderate vulnerability class (53.03%). Multiple regression analysis show that the most dominant parameter affecting is the depth of groundwater which significant level is 0,003. Through crosstab test and graphics, it is known that a class of vulnerabilities has a proportional correlation to the number of fecal coli. Correlation analysis showed that the results of the DRASTIC vulnerability index and HAI vulnerability index have significance to the phosphate levels, and it has a weak-to-moderate levels with coefficient correlation 0,340 dan 0,425.