| RIVER SYSTEM AND DISTURBANCE FACTORS IN THE LAKE TOBA |
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| 作者姓名： | ZulkifliNasution MashhorMansor |
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| 作者单位： | [1]FacultyofAgriculture,UniversitasofSumateraUtara,Medan,Indonesia [2]SchoolofBiologicalSciences,UniversityofSainsMalaysia,11800Penang,Malaysia |
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| 摘 要： | Situated at an elevation of 905 m above sea level in the Province of North Sumatra, Lake Toba and its surrounding landscapes are regarded as a natural heritage in a certain extent, as a quoted national treasure. Unfortunately degradation of the land and water resources in the watershed along Lake Toba is taking place at an alarming and totally unacceptable rate. The quality of the lake is partly depended on input the quality of the rivers. When compared to the control area the water quality that influenced by the piggeries are highly polluted. It can be concluded that the Salbe River at the downstream of the piggeries has been polluted and apparently it is a serious problem to the catchment area management. It should be noted that the polluted river would influence the water quality of the Lake Toba. Based on calculation, the permissible BOD5 according to B- river standard is 238 mg/L, it means the river still in B standard but the condition and quality are decreasing continuously. Following the Indonesian health standard the permissible BOD is - 461 mg/L. It means BOD in the river should be reduced 461 mg/L or clean program is needed.
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| 关 键 词： | 湖泊 水环境 环境保护 水质 |
RIVER SYSTEM AND DISTURBANCE FACTORS IN THE LAKE TOBA |
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| ZulkifliNasution MashhorMansor.RIVER SYSTEM AND DISTURBANCE FACTORS IN THE LAKE TOBA[J].Wetland Science,2004,2(2):104-109. |
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| Authors: | Zulkifli Nasution Mashhor Mansor |
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| Institution: | 1. Faculty of Agriculture, Universitas of Sumatera Utara, Medan, Indonesia
2. School of Biological Sciences, University of Sains Malaysia, 11800 Penang , Malaysia |
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| Abstract: | Situated at an elevation of 905 m above sea level in the Province of North Sumatra, Lake Toba and its surrounding landscapes are regarded as a natural heritage in a certain extent, as a quoted national treasure. Unfortunately degradation of the land and water resources in the watershed along Lake Toba is taking place at an alarming and totally unacceptable rate. The quality of the lake is partly depended on input the quality of the rivers. When compared to the control area the water quality that influenced by the piggeries are highly polluted. It can be concluded that the Salbe River at the downstream of the piggeries has been polluted and apparently it is a serious problem to the catchment area management. It should be noted that the polluted river would influence the water quality of the Lake Toba. Based on calculation, the permissible BOD 5 according to B-river standard is 238 mg/L, it means the river still in B standard but the condition and quality are decreasing continuously. Following the Indonesian health standard the permissible BOD is - 461 mg/L. It means BOD in the river should be reduced 461 mg/L or clean program is needed. |
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| Keywords: | lake disturbance piggery pollution water quality |
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