Bioresources changing and transite by Hydropower and irrigation system in Tay Nguyen

Nguyen Lap Dan, Ha Quy Quynh

Abstract


There are 638 hydropower and irrigation reservoirs, which covered 78.698 ha, approximate 1.44% area of TayNguyen. The hydropower and irrigation system impacts to habitat of 4.013 species of plant (30% of Vietnam), 126species of mammal , 412 species of bird, 64 species of reptile, 30 species of amphibian.The total loosen biomass by the hydropower and irrigation system is 15.7 million tons, included: Dak Lak province2,828,560 tons loss by flood; Dak Nong: 2,427,208 tons; Gia Lai - 4,367,638 tons; Kon Tum 3,689,574 tons; Lam Dong:2,426,386 tons. The reservoirs also interrupt the migration route of aquatic animal.Beside the impactions above, the hydropower and irrigation system in Tay Nguyen has created the 142 aquatichabitat, with the area below <10ha; 402 site with the area from 10-100 ha and 94 aquatic habitat sites with large area,over 100ha. The areas of 78696 ha of aquatic has increate habitat for aquatic species and the species feeding in waterenvironment. The total of 638 aquatic sites play an importance role for develop fishery economic. Up to 2010 thefisheries productivity is 20.603 tons, approximate 0,76% of the Vietnam, and it is twice times of the 2006’s productivity.The Lam Dong province increase with highest speed, about 0.2237 tons per hectare and Kon Tum province increaseswith lowest speed about 0.037 tons per hectare.

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Niên giám thống kê năm 2010, 2011. NhàXuất bản thống kê 2011.


Keywords


reservoirs, Tay Nguyen, bioresources, changing, hydropower and irrigation system

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DOI: https://doi.org/10.15625/0866-7187/36/1/4144 Display counter: Abstract : 52 views. PDF : 179 views.

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Vietnam Journal of Earth Sciences, ISSN: 0866 - 7187

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