Kajian Intrusi Air Laut melalui Sungai di Pesisir Kabupaten Demak Jawa Tengah

https://doi.org/10.22146/mgi.13431

Darmakusuma Darmanto(1*), Ahmad Cahyadi(2)

(1) Fakultas Geografi, Universitas Gadjah Mada, Yogyakarta
(2) Fakultas Geografi, Universitas Gadjah Mada, Yogyakarta
(*) Corresponding Author

Abstract


ABSTRAK Penelitian ini bertujuan untuk mengetahui sebaran spasial salinitas air sungai di Kabupaten Demak dengan melakukan pengukuran salinitas di lapangan menggunakan Electric Conductivity (EC) meter. Intrusi air laut yang dianalisis dalam penelitian ini terbatas hanya pada penyusupan air laut melalui sungai. Penelitian dilakukan dengan pengukuran daya hantar listrik (DHL) di sepanjang sungai denganjarak setiap 500 meter, dimulai dari muara sungai untuk di Sungai Demangan dan 1.000 meter untuk Sungai Tuntang Lama. Hasil penelitian menunjukkan bahwa intrusi melalui sungai di Pesisir Demak berpengaruh besar pada kualitas air sungai. Kualitas air sungai yang menjadi payau sampai dengan asin pada jarak > 4 km di Sungai Demangan dan > 7 km di Sungai Tuntang Lama.


ABSTRACT This study is aimed to determine the spatial distribution oj river water salinity in Demak by measuring electrical conductivity in thefield using EC meter. Seawater intrusion analyzed in this study is limited to intrusion through the river. The study is conducted by measuring the electrical conductivity along the river with a distance oj 500 meters every. The measurements began 500 meterfrom the mouth oj the river at the River Demangan, and 1000 meter on the River Tuntang Lama. The result shows that the intrusion through the river in the coastal Demak has a big impact on the quality oj river water. Brackish to brine water quality isfound up to a distance oj 4 kilometers on the river Demangan, and 7 kilometers long on the River Tuntang.


Keywords


Demak; intrusi; sungai; Demak; intrusion; river




DOI: https://doi.org/10.22146/mgi.13431

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Accredited Journal, Based on Decree of the Minister of Research, Technology and Higher Education, Republic of Indonesia Number 30e/KPT/2018

Volume 31 No 2 the Year 2017 for Volume 35 No 2 the Year 2021

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