洞庭湖区的泥沙淤积效应

doi:10.11821/xb200805007

Abstract

Abstract:

According to a long series of measured sediment data, the sedimentation effects of Dongting Lake were studied in light of the relationship between sedimentation characteristics and the resources & environment. The result shows that the long-term deposition and the impact of human activities has led to a cycle of the evolution of sedimentation pattern, resulting in sediment disaster effects and resources effects in Dongting Lake. The main features are as follows: 1) The water beach, silt beach, lake marsh beach, reed beach and other types of beach shaped by sedimentation effects, constitute the main body of the giant lake system. 2) The disaster chains are induced, i.e. sedimentation → marshland expansion & reclamation → flood function decline, the fish resource depletion, biodiversity reduction disaster chain, sedimentation → marshland expansion → floods, water pollution disaster chain, sedimentation → marshland floating vegetation rising → schistosomiasis, rodents virulence disaster chain, sedimentation → flood embankment bursting → land desertification disaster chain. 3) Sedimentation has created about 98.13 ×10⁴ hm² of land in the past 55 years. Rational development and utilization of marshland resources have produced tremendous economic benefits.

Key words: sediment, lake beach, sediment disaster chain, sand resources

LI Jingbao, YIN Hui, LU Chengzhi, MAO Dehua, ZHOU Heping. Impact of Sedimentation on Dongting Lake[J].Acta Geographica Sinica, 2008, 63(5): 514-523.

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Impact of Sedimentation on Dongting Lake

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