Application of USLE and MUSLE Models for the Prediction of Land Erosion in the Catchment Area of the Delingan Reservoir | Chapter 9 | Current Research on Geography, Earth Science and Environment Vol. 4

 

Tirtomarto reservoir, or locally known as Delingan reservoir, is located in the village of Delingan, Karanganyar District, Karanganyar Regency, Central Java Province in Indonesia. Due to its strategic location, the Delingan reservoir plays an important role in meeting irrigation needs for agricultural land covering an area of 1380 ha every year, but over time the Delingan reservoir is now visible. experienced a decrease in its water capacity and resulting in a decrease in water supply for agricultural land. This is due to the large amount of land erosion that occurs. Soil erosion is often reported as the worst form of land degradation with serious environmental and socio-economic ramifications. This study aims to calculate the value of land erosion that occurs in the catchment area of the Delingan reservoir, which can later be handled so that sedimentation in the reservoir can be overcome and the water supply can be maintained. Prediction of soil erosion in this study using the USLE (Universal Soil Loss Equation) and MUSLE (Modified Universal Soil Loss Equation) methods. The formulation of the USLE method allows planning to predict the erosion rate of a particular land with a slope at a certain rain pattern and soil type as well as land management and use for crops or land conservation. The MUSLE method is a modification of the USLE method. The results of this study obtained the value of the erodibility factor of rain (R) from 2015-2019, the soil erodibility factor (K) of 0.04, the length and slope factor (LS) of 1.99, the factor of land cover plants and the factor of conservation measures. (CP) of 0.04. In the USLE method, the erosion value is 7605.89 tons/year. Then the maximum flood discharge value (QP), surface runoff (QQ), and surface runoff (R) can be obtained so that the erosion value using the MUSLE method is 862.88 tons/year. These findings indicate considerable soil erosion within the catchment area, contributing to reservoir sedimentation, using the USLE and MUSLE models. A more disciplined in analysing and reading the data on the available maps is recommended to get appropriate results. Future investigations on land erosion in the Delingan Reservoir catchment area, particularly those employing the USLE and MUSLE methods, should utilise complete datasets and apply the full equations rather than relying solely on map-based estimations.

 

Author(s) Details

Jaji Abdurrosyid
Department of Civil Engineering, Engineering Faculty, Universitas Muhammadiyah Surakarta, Jl. Ahmad Yani Tromol Pos1, Pabelan Surakarta 57102, Indonesia.

 

Fathul Ngalim
Department of Civil Engineering, Engineering Faculty, Universitas Muhammadiyah Surakarta, Jl. Ahmad Yani Tromol Pos1, Pabelan Surakarta 57102, Indonesia.

 

Renaningsih
Department of Civil Engineering, Engineering Faculty, Universitas Muhammadiyah Surakarta, Jl. Ahmad Yani Tromol Pos1, Pabelan Surakarta 57102, Indonesia.

 

Agus Riyanto

Department of Civil Engineering, Engineering Faculty, Universitas Muhammadiyah Surakarta, Jl. Ahmad Yani Tromol Pos1, Pabelan Surakarta 57102, Indonesia.

 

Gotot Slamet Mulyono
Department of Civil Engineering, Engineering Faculty, Universitas Muhammadiyah Surakarta, Jl. Ahmad Yani Tromol Pos1, Pabelan Surakarta 57102, Indonesia.

 

Please see the book here :- https://doi.org/10.9734/bpi/crgese/v4/5277