Pengaruh Perubahan Tata Guna dan Tutupan Lahan Terhadap Hidrograf Aliran DAS Sarokah Kabupaten Sumenep

Zainah, Nor (2024) Pengaruh Perubahan Tata Guna dan Tutupan Lahan Terhadap Hidrograf Aliran DAS Sarokah Kabupaten Sumenep. Masters thesis, Institut Teknologi Sepuluh Nopember.

Text 6012221001-Master_Thesis.pdf - Accepted Version Restricted to Repository staff only until 1 October 2026. Download (13MB) | Request a copy

Abstract

Pembangunan dan pengembangan infrastruktur tidak dapat dielakkan seiring dengan dinamika kebutuhan penduduk yang terus meningkat. Hal ini berdampak pada perubahan tata guna dan tutupan lahan yang mempengaruhi proses hidrologi pada suatu DAS. Penelitian ini dilakukan untuk mengetahui perubahan hidrograf aliran sungai akibat perubahan tata guna dan tutupan lahan di Daerah Aliran Sungai (DAS) Sarokah Kabupaten Sumenep dengan luas ± 472,22 km2. Penelitian ini menggunakan data sekunder berupa data curah hujan, data debit terukur, peta RTRW 2043, peta jenis tanah dan peta topografi. Analisis perubahan tata guna dan tutupan lahan dilakukan dengan menggunakan citra satelit pada tahun 2002, 2013 dan 2023. Nilai perubahan tata guna lahan pada DAS Sarokah dari tahun 2002 hingga 2023 mengalami pengurangan luasan sebesar 1,41 % pada area badan air, 14,28% pada area sawah, dan 2,78% pada area hutan. Sedangkan pada area lahan terbangun, perkebunan, lahan terbuka dan semak belukar mengalami pertambahan luasan sebesar 3,23%, 8,09%, 0,82% dan 6,33% secara berturut-turut. Pemodelan hidrologi menggunakan HEC-HM dengan metode SCS (Soil Conservation Service) dan kalibrasi pada parameter Initial abstraction, curve number (CN) serta lag time. Kalibrasi-validasi Model Hidrologi HEC-HMS DAS Sarokah Model 01 diperoleh nilai rata-rata parameter statistik R2 adalah 0,71 (baik), RMSE Stdev 0,6 (cukup) dan NSE adalah 0,67 (cukup). Perubahan tata guna dan tutupan lahan dari tahun 2002-2023 menunjukkan kenaikan rata-rata debit puncak sebesar 24,82%. Nilai debit puncak untuk prediksi perubahan tata guna dan tutupan lahan pada tahun 2023-2043 berdasarkan hasil prediksi adalah 15,70% dan 57,97% berdasarkan peta RTRW Kabupaten tahun 2043.

========================================================================================================================

Infrastructure development and expansion are inevitable alongside the dynamic needs of an increasingly large population. This impacts land use and landcover changes, thereby affecting hydrological processes in watersheds. This study aimed to determine the changes in river flow hydrographs due to land use and cover changes in the Sarokah Watershed, Sumenep Regency, covering an area of ± 472.22 km². This study uses secondary data, including rainfall data, measured discharge, 2043 spatial plan maps (RTRW), soil type maps, and topographic maps. Land use and land cover changes were analyzed using satellite imagery from 2002, 2013, and 2023. The Sarokah Watershed experienced a reduction in land use areas from 2002 to 2023, with decreases of 1.41% in water bodies, 14.28% in paddy fields, and 2.78% in forest areas. Conversely, there were increases in built-up areas (3.23%), plantations (8.09%), open land (0.82%), and shrubland (6.33%). Modeling was carried out using HEC-HMS with the SCS (Soil Conservation Service) method, calibrated on the parameters of initial abstraction, curve number (CN), and lag time. The calibration and validation of the HEC-HMS Hydrological Model for Sarokah Watershed Model 01 yielded average statistical parameter values of R² = 0.71 (good), RMSE Stdev = 0.6 (fair), and NSE = 0.67 (fair). The land use and cover changes from 2002to2023 showed an average peak discharge increase of 24.82%. The predicted peak discharge values for land use and cover changes from 2023 to 2043 are 15.70% based the prediction map and 57.97% based on the 2043 spatial plan map of the regency.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	hidrograf aliran, tata guna dan tutupan lahan, HEC-HMS, SCS-CN flow hydrograph, land use and land cover, HEC-HMS, SCS-CN
Subjects:	G Geography. Anthropology. Recreation > GB Physical geography > GB1399.2 Flood forecasting. T Technology > TA Engineering (General). Civil engineering (General) T Technology > TD Environmental technology. Sanitary engineering > TD194.6 Environmental impact analysis
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Civil Engineering > 22101-(S2) Master Thesis
Depositing User:	Nor Zainah
Date Deposited:	10 Aug 2024 07:41
Last Modified:	10 Aug 2024 07:41
URI:	http://repository.its.ac.id/id/eprint/113836

Actions (login required)

View Item