Land Use Potential on Water Balance Based on SWAT Method in Saddang Watershed in Bendung Benteng Irrigation System
(1) Muhammadiyah University of Parepare
(2) University of Muhammadiyah Parepare
(3) University of Muhammadiyah Parepare
(4) University of Muslim Maros
(5) University of Muhammadiyah Parepare
(*) Corresponding Author
Abstract
Saddang Watershed (DAS) as a large watershed in Sulawesi, rich in natural resource potential in the form of land, topography, slope, geology, soil, vegetation, climatology; rainfall, temperature, humidity, and sunshine. In maintaining and utilizing (watershed management) availability and water requirements for; humans, plants and animals. The availability and demand of water in watershed management requires the role of land in regulating agroclimatology and hydrology conditions. The water balance approach method used is SWAT (Soil and Water Assessment Tool) method of soil and water assessment tools, to determine the condition of availability and demand of water in an effort to maintain water flow conditions at all times (number and distribution) of Bendung Benteng irrigation system, which is capable of supply water for paddy field irrigation in two regencies of South Sulawesi’s paddy granaries namely Pinrang Regency and Sidrap Regency. According to the Schmidth-Fergusson climate classification, the type of climate in Saddang watershed area belongs to type C climate = slightly wet area with tropical rainforest vegetation, the average amount of rainfall ranges from 2.155 mm/year. This indicates that there is large level of rainfall every year and land use with a forest area of 676,39 or 26,41% of the watershed area, thus Saddang watershed is able to save tremendous amount of water supply. Based on the results of the water balance analysis using SWAT method, the amount of water available in the average watershed ; 3.133 mm year-1, the amount of water being flowed ; 1.040,9 mm, and stored as ground water ; 29,60 mm, as well as direct runoff ; 366,9 mm and flow coefficient of 0,45. Hence, there is 45% of the flow loss as surface stream and there is 55% of the flow stored in the watershed, and the model application is categorized as good both in conducting simulations and validating the flow discharge on Saddang River. Watershed processing classified as having good watershed conditions, because one indicator of a watershed's water performance can be seen from the river discharge fluctuation. River discharge fluctuations can be seen from the river regression coefficient (KRS), which is a number that shows ratio between maximum discharge (Qmax) and minimum discharge (Qmin). The highest discharge (Qmax) was 30.805 m³/sec while the lowest discharge (Qmin) was 994 m³/sec. The regression coefficient value (KRS) of Saddang River watershed was 26.650 m³/sec. Based on the results of the 2017 data analysis, the condition of Saddang watershed provides surplus value of 1.911.986 (m3 year-1), out of the total water availability of 2.155.273 (m3 year-1) minus the total irrigation water requirement of 243.286,50 m3 year-1, with the pattern of planting paddy-paddy-secondary crops (palawija). Therefore, Saddang watershed has the ability to store large amounts of water throughout the year
Keywords
Full Text:
PDFReferences
Admadhani, N.A., A.T. Sutanhaji, & L.D. Susanawati. (2014). Analisis Ketersediaan dan Kebutuhan Air Untuk Daya Dukung Lingkungan. (Studi Kasus Kota Malang). Jurnal Sumberdaya Alam dan Lingkungan, 1(3): pp.13-20.
Baja, S. (2012). Perencanaan Tata Guna Tanah dalam Pengembangan Wilayah Pendekatan Spasial dan Aplikasinya, Yogyakarta:.Andi Offset.
Emilda, A. (2010). Dampak Perubahan Penggunaan Lahan terhadap Respon Hidrologi DAS Cisadane Hulu. Tesis Tidak Diterbitkan. Sekolah Pascasarjana Institut Pertanian Bogor.
Hartanto, N. (2009). Kajian Respon Hidrologi Akibat Perubahan Penggunaan Lahan pada DAS Separi Menggunakan Model HEC-HMS. Tesis Tidak Diterbitkan. Sekolah Pascasarjana Institut Pertanian Bogor.
Lipu, S. (2010). Analisis Pengaruh Konversi Hutan terhadap Larian Permukaan dan Debit Sungai Bulili, Kabupaten Sigi. Media Litbang Sulteng III No. (1): 44-50, Mei 2010.ISSN : 1979 -5971.
Nugroho, P. (2015). Model Soil Water Assessment Tool (Swat) untuk Prediksi Laju Erosi dan Sedimentasi di Sub Das Keduang Kabupaten Wonogiri. [unpublished skripsi]. Universitas Muhammadiyah Surakarta.
Pamungkas, A. (2012). Pengertian Siklus Hidrologi dan Penyebab Terjadinya.Dilihat tanggal 17 Agustus 2014.
Rustiadi E., Saefulhakim, S., & Panuju, D.R. (2010). Perencanaan dan Pengembangan Wilayah. CrestPent Press. Bogor.
Soemarto, C.D. (1999). Hidrologi Teknik. Penerbit Erlangga : Jakarta.
Sosrodarsono, S. & Takeda. (2006). Hidrologi Untuk Pengairan. Jakarta : Pt.Pradnya Pramita.
Triatmodjo, B. (2010). Hidrologi Terapan. Gadjah Mada University
Press. Yogyakarta.
DOI: https://doi.org/10.31327/atj.v3i2.857
Article Metrics
Abstract view : 875 timesPDF - 404 times
Refbacks
- There are currently no refbacks.
Copyright (c) 2018 ATJ All rights reserved

This work is licensed under a Creative Commons Attribution 4.0 International License.
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Agrotech Journal  Jl. Pemuda, No. 339 Kolaka, Southeast Sulawesi, Indonesia - 93517 ONLINE ISSN: 2548-5148  PRINT ISSN: 2548-5121 Mobile: +62811402721 WA: +628111072907  E-mail: editor.atj@usnsj.com or agrotechjournal@gmail.com
Universitas Sembilanbelas November Kolaka, USN Scientific Journal Publisher (Hardcopy Provider) Jl. Pemuda, No. 339 Kolaka, Southeast Sulawesi, Indonesia - 93517 E-mail: info@usnsj.com
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------Agrotech Journal licensed under a Creative Commons Attribution 4.0 International License.
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------