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- W2785998085 abstract "Sumber Jaya (54,194 hectares) is a district in West Lampung, Indonesia. Sumber Jaya is located at the upper part of Tulang Bawang watershed, known as Way Besai watershed and this watershed is a major water resource for Lampung Province, Indonesia. Sumber Jaya has recently become a focal point of discussion because of the widespread conversion of forestland to coffee plantations and human settlements and the associated environmental and hydrological problems. This research aimed to evaluate Sumber Jaya watershed condition affecting by rapid land cover change using hydrological methods. Stream discharge and rainfall during individual storms in each catchment were plotted and quantitative hydrograph analysis was calculated. Unit hydrograph was also used to calculate discharge from a given excess rainfall. First, unit hydrograph in this study was computed by IHACRES model. IHACRES expressed the relationship of rainfall and runoff in peak response, recession rate, time constant and relative volume of quick and slow flow. Second, unit hydrograph for a catchment was also constructed from observations of input and response for several significant storms of approximately equal duration. The result showed that most of the stormflow from these catchments consisted of slow flow. A maximum of about 50% of the effective rainfall became quick flow, and only 1 to 10% of remaining effective rainfall which was routed as slow flow contributed to hydrograph peaks; the rest was stored. Comparing peak responses and recession rates, stormflow discharge was generally increased more slowly on the rising limb of the hydrograph and decreased more rapidly on the falling limb. This response pattern indicates that the soils in these catchments were able to hold and store rain water. Key Words: forest conversion, hydrograph analysis, rainfall-runoff, slow flow, unit hydrograph" @default.
- W2785998085 created "2018-02-23" @default.
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- W2785998085 date "2018-08-01" @default.
- W2785998085 modified "2023-09-22" @default.
- W2785998085 title "Hydrological Consequences Of Converting Forestland To Coffee Plantations And Other Agriculture Crops On Sumber Jaya Watershed, West Lampung, Indonesia" @default.
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