Value of Surface Rule Coefficient (C) in Uwemanje Village, Kinovaro District, Sigi Regency
Abstract
Along with the increasing population growth, the demand for water and land needs also increases. So it tends to cause changes in land use, especially forests, which will affect the water system function of a watershed. This shows that there is a need for conservation efforts to maintain the sustainability of the watershed and its water availability. Land use is a reflection of human activities on land. Land use can be detected based on the land cover. Flood disasters occur due to land use that is not suitable for its designation. Changes in land use result in changes in surface water runoff which can be known based on the coefficient of surface runoff. The greater the rain that occurs, the greater the surface flow, resulting in floods and landslides. The Uwemanje sub-watershed is a hydrological regulator as well as a source of irrigation water for the villages of Porame, Binanngga, Baliase, Boya Baliase, Padende, Sibedi and Uwemanje Alone. The Uwemanje sub-watershed has a very important role in life, especially the daily needs of the Uwemanje community as well as agriculture, animal husbandry and plantations. To find out whether the hydrological characteristics of the Uwemanje sub-watershed are getting better or worse, the flow trend of the Uwemanje sub-watershed can be seen by calculating the runoff coefficient (C), by first analyzing the discharge and rainfall. This research was conducted from April to June 2022 in Uwemanje Village, Kinovaro District, Sigi Regency, and Central Sulawesi Province. The method used to determine the value of the runoff coefficient (C) is the rational method. Based on the observations and measurements made in this study, the results showed that the area of the Uwemanje Village watershed was 12,470,000 m², daily discharge was 12,966.57 m³, rainfall was 0.07893 meters, and the runoff coefficient (C) was 0.0013. The hydrology of the water catchment area (DTA) of the Uwemanje Village is still in a stable condition, which means that the forest with its function as a water regulator has not experienced high physical disturbances.
References
Asdak, C. (2002). Forests and Water Flow Behavior: Clarifying the Existence of Forests And its effect on flooding and water shortages. Humans And ,Environment9 (2002).
Arsyad, S. (2009). Soil and water conservation. PT Publisher IPB Press.
Aryandi FJB (2022). Relationship between water discharge and water level in the Berdikari sub-watershed, Palolo sub-district, Sigi district.
Agustinus M. (2016). Runoff Coefficient Value (C) Gumbasa Sub-watershed in Palolo District, Sigi Regency.
Cahyadi, A., Listyaningrum, N., Lestari, SF, & Riyanto, IA (2017). Code River Border Management as an Effort to Preserve Watershed Ecosystems inYogyakarta City and Surrounding Areas.
Environmental services. (01 October 2019). What is a watershed (DAS). https://dlh.bulelengkab.go.id/information/detail/article/apa-itu-area stream-sungai-das-28. Accessed on Monday, 07 March 2022. 09.00 Wita.
Director General, RLPS (2009). Regulation of the Director General of Land Rehabilitation Dan Social Forestry Number: P. 04/VSET/2009 Date: 05 March 2009 About Guidelines for Monitoring and Evaluation of Watersheds. https://institutionalandas.wordpress.com/institutional-pengelolaan-das/sk dirjen-rlps-1/
Hakim, MS (2021). WATER QUALITY IN KALIKONTO DAS BRANTAS (Doctoral dissertation, University of Muhammadiyah Malang). http://eprints.ums.ac.id/41345/4/BAB%20I.pdf. Accessed on Monday, 07 March 2022. 09.00 Wita.
Ministry of Public Works Research and Development Center for Research and Development of Water Resources Bandung. (December, 2014). Research on Hydrological Characteristics and Erosion Rates as Functions of Land Use Change.
https://simantu.pu.go.id/personal/imggpost/adminkms/post/2021030113032F 0372014 Determination-Nilai-Koefisi-Aliran-pada-Berbagai-Penutp-Lahan.pdf. Accessed on Monday, 07 March 2022. 09.00 Wita.
Lia, H. (2021). Runoff Coefficient Analysis (C) in Reak Basin, Bayan. District North Lombok Regency (Doctoral dissertation, Mataram University).
Moha, S., Taslim, I., & Jaya, R. (2020). Estimation of the Sedimentation Rate UsleModel in the Biyonga Sub-watershed (Sedimentation Rate Estimation Using USLE Models In Biyonga Watershed). Journal 1Geographic Information, 3), 53-64.
Nurudin. (26 June 2013). Watersheds in Central Sulawesi. https://kangnur.org/2013/06/26/area-aliran-sungai-di-sulawesi-tengah/. Accessed on Wednesday, March 16, 2022. At 22:10 WITA.
Neno, AK, Harijanto, H., & Wahid, A. (2016). Relationship between water discharge and height water level in the Lambagu River, Tawaeli District, Palu City. Journal of Warta Jungle,4 (2).
Putri, IR, Rusdi, M., & Basri, H. (2020). Evaluation of Peak Discharge of Sub-watershed Krueng Seulimum, Aceh Besar District.
Paramitha, TA, & Rauf, A. (2018). Runoff Coefficient Value (C) Sub-watershed Taripa in Toaya District, Donggala Regency, Sulawesi Province Middle. Journal of Warta Jungle, 6(1).
Central Sulawesi. (Thursday, August 29, 2019). Watershed Management in Central Sulawesi. https://sultengraya.com/read/83485/pengelolaan-das-di-sulteng-not optimal/. Accessed on Wednesday, March 16, 2022. At 22.00 WITA.
Thesis. (2011). Doc http://eprints.ums.ac.id/66665/15/BAB%20II.pdf. Accessed on Thursday, March 17, 2022. At 15.00 WITA.
Wiadnyana, DM, Subagiada, K., & Natalisanto, AI (2019). Relationship of LocationWater Level and Flow of Karang Mumus River at Pampang Village Samarinda City. Geosciences Kutai Basin, 2(2).
