Effect of rainfall on assessment of hydrologic sustainability in Citanduy sub-watersheds

Hydrology is one of the criteria for monitoring and evaluation (monev) of watersheds management as stated in the Minister of Forestry Regulation Number P.61/Menhut-II/2014. So far, the use of various hydrological parameters for the monev of watersheds has not been evaluated whether these parameters...

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Bibliographic Details
Published in:IOP conference series. Earth and environmental science 2023-06, Vol.1201 (1), p.12032
Main Authors: Pramono, I B, Basuki, T M, Auliyani, D
Format: Article
Language:English
Subjects:
Annual rainfall
Carrying capacity
Citanduy
Criteria
Data collection
Flood frequency
Flow
Flow coefficients
Forestry
Hydrology
Land cover
Land degradation
Parameters
Rainfall
Regression analysis
Rehabilitation
Sediment load
Sediments
Sustainability
Water use
watershed carrying capacity
Watersheds
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Summary:Hydrology is one of the criteria for monitoring and evaluation (monev) of watersheds management as stated in the Minister of Forestry Regulation Number P.61/Menhut-II/2014. So far, the use of various hydrological parameters for the monev of watersheds has not been evaluated whether these parameters truly reflect the condition of the watershed. This study aimed (1) to evaluate the effect of rainfall on the hydrological criteria of each sub-watershed, which include: flow regime coefficient, annual flow coefficient, sediment load, and water use index and (2) to evaluate the effect of rainfall on watershed carrying capacity. Regression analysis was used to see the relationship between annual rainfall and hydrological parameters used in watershed sustainability. This analysis was crucial to see the development of forest and land rehabilitation efforts in restoring degraded land. Data collection was carried out from 2008 to 2016 in each of the sub-watersheds of the Citanduy Watershed, namely Cijolang, Cikawung, Cimuntur, Ciseel, and Upper Citanduy. From this research, it is known that flow regime coefficient, annual flow coefficient, sediment load, water use index, and flood frequency are strongly influenced by rainfall so the result in evaluating watershed carrying capacity may vary depending on the rainfall. Besides being influenced by rainfall, flow regime coefficient, annual flow coefficient, and sediment load are also affected by land cover, while the slope affects the sediment load.
ISSN:1755-1307
1755-1315
DOI:10.1088/1755-1315/1201/1/012032