Electronic Theses and Dissertation

ABSTRAK

Tujuan dari penelitian ini untuk mengetahui kondisi vegetasi mangrove dan kualitas air tanah permukaan di sepanjang wilayah pesisir serta korelasi keberadaan vegetasi mangrove terhadap kualitas air tanah permukaan (sumur gali) dalam upaya pengurangan risiko pencemaran atau penurunan kualitas sumber air di wilayah pesisir Kecamatan Baitussalam Kabupaten Aceh Besar. Penelitian ini menggunakan metode survei dengan mengumpulkan dan menganalisis data primer meliputi data pengukuran kualitas air (salinitas, pH, total dissolved solids, kekeruhan, E-coli dan Zat Organik), water table (kedalaman muka air tanah) dan luas sebaran serta jenis vegetasi mangrove, sedangkan data sekunder meliputi data batas administrasi, tutupan hutan mangrove dan data hidrologi. Hasil penelitian menggambarkan bahwa zona tumbuh mangrove menyebar pada sempadan garis pantai Desa Cadek dengan kerapatan individu 850 pohon/ha dan Desa Khaju dengan kerapatan individu 980 pohon/ha. Berdasarkan kerapatan individu Rhizophora (Rhizophora apiculata dan Rhizophora mucronata) dan Avicennia marina termasuk rendah atau jarang. Kualitas air tanah permukaan dengan vegetasi mangrove memiliki nilai yang lebih baik dibandingkan tanpa vegetasi mangrove, yaitu; kekeruhan: 0,73-4,46 NTU dan 4,56-9.64 NTU; TDS: 97,00-1.428,00 mg/L dan 262,00-2.800,00 mg/L; pH: 6,93-9,15 dan 6,30-8,11; salinitas: 0,08-1,48 ‰ dan 0,23-2,83 ‰; e-coli: 3,79-22,12 MPN/100ml dan 5,37-20,22 MPN/100 ml; zat organik: 21,00-2.100,00 mg/L dan 17,00-2.400,00 mg/L. Hasil uji t dan korelasi menunjukkan ada pengaruh dari keberadaan vegetasi mangrove disepanjang wilayah pesisir Kecamatan Baitussalam dalam memperbaiki kualitas air tanah permukaan yang secara keseluruhan menunjukan arah positif dan hubungan yang cukup serta menunjukkan arah positif dan kolerasi yang kuat terhadap nilai kekeruhan.
Kata kunci : vegetasi mangrove, kualitas air, baku mutu air.


ABSTRACT


The purpose of this study was to determine the condition of mangrove vegetation and groundwater quality surface along the coastal areas as well as the correlation of the presence of mangrove vegetation on groundwater quality surface (wells) in efforts to reduce the risk of contamination or loss of quality of water resources in coastal areas Baitussalam Sub-district, Aceh Besar District , This study uses a survey by collecting and analyzing primary data includes measurement data of water quality (salinity, pH, total dissolved solids, turbidity, E-coli and Organic Matter), the water table (depth of groundwater level) and wide distribution and types of mangrove vegetation , while secondary data include administrative boundary data, mangrove forest cover and hydrological data. The results of the study illustrate that growing zone spreads on border mangrove shoreline Cadek village with individual density 850 trees / ha and the village of 980 people Khaju density of trees / ha. Based on the density of individuals Rhizophora (Rhizophora apiculata and Rhizophora mucronata) and Avicennia marina is low or infrequent. The quality of ground water surface with mangrove vegetation has better value than without mangrove vegetation, namely; turbidity: 0.73 to 4.46 NTU and 4,56-9.64 NTU; TDS: 97.00 to 1428.00 mg / L and 262.00 to 2800.00 mg / L; pH: 6.93 to 9.15 and from 6.30 to 8.11; salinity: 0.08 to 1.48 and from 0.23 to 2.83 ‰ ‰; E-coli: 3.79 to 22.12 MPN / 100ml and 5.37 to 20.22 MPN / 100 ml; organic substances: 21.00 to 2100.00 mg / L and 17.00 to 2400.00 mg / L. T-test and correlation showed no effect on the existence of mangrove vegetation along the coastal region of Subdistrict Baitussalam in improving the quality of ground water surface as a whole showed a positive direction and the relationship enough and shows the positive direction and the correlation is strong against the turbidity value.


Keywords: mangrove vegetation, water quality, water quality standard.

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