RAINFALL PLAN ANALYSIS FOR DETERMINING MAXIMUM DISCHARGE OF MINING AREA PT.ADARO
Mining area of PT. Adaro located at Watershed Nagara. Nagara river basin which is the largest river basin in South Kalimantan potential flooding in several points around the PT. Adaro. Flood events that may occur will certainly result in delays in mining sustainability that directly impact the produ...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/17956 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Mining area of PT. Adaro located at Watershed Nagara. Nagara river basin which is the largest river basin in South Kalimantan potential flooding in several points around the PT. Adaro. Flood events that may occur will certainly result in delays in mining sustainability that directly impact the productivity of coal mines and coal quality are produced. Therefore the study of the hydrological aspects of the plan, especially rain and flood discharge plan as a basis for mine planning drainage system is needed. One method to determine the rainfall plan is a method of Iwai-Kadoya, while the method for determining the flood discharge plan is with HEC-1 models. Plans rainfall return period 3, 5, 10, 50 and 100 years for the sub-watershed Balangan is 97 mm, 103.1 mm, 109.9 mm, 122.1 mm and 126.6, while for sub-watershed Tabalong 99, 3 mm, 109 mm, 120.1 mm, 141.4 mm and 149.6 mm. Flood discharge outlet plan on TB1, TB2, BL1, BL2, BL3 and BL3 respectively in m3/second is a 510-year return period 3, 47, 21, 60, 161, and 371, 602 5-year return period, 58 , 28, 83, 197, and 439, 715-year return period 10, 72, 38, 1123, 241, and 522, 50-year return period of 952, 102, 60, 180, 341, and 699, 100-year return period, 1049 , 114, 69, 209, 383, and 772, 200-year return period of 1144, 126, 79, 239, 426 and 844. |
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