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| Plant management measures on water-level-fluctuating-zone in Three Gorges Reservoir Area |
| ZHOU Meng-Chao1, 2 , YANG Beng1, HU Wen-Nian1, 2 , XIAO Hai1 |
| (1. College of Civil Engineering & Architecture, China Three GorgesUniversity, 443002, Yichang, Hubei; 2. Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, 443002, Yichang, Hubei: China) |
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Abstract According to the degree of soil erosion and the change rule of water level of water-level-fluctuating-zone in Three Gorges Reservoir Area, this paper divided the water-level-fluctuating-zone into three zones, 145 -152 m (bottom zone), 152 -170 m (middleend zone), 170 -177 m (top zone) respectively. The ecological management mode of combing plant and engineering measures were conducted at the 185 m observation platform upstream in Three Gorges Reservoir Area. Four kinds of indices including vegetation coverage, species, species diversity, the loss of plant growth matrix. were selected to analyze the effect of ecological restoration. The results show that the vegetation coverage along with the slope surface of water-level-fluctuating-zone from up to down reduced year by year in experimental observation period. As submerged by water for a long time, the types of species reduced,the uniformity presented great difference with different elevation, and the alpha diversity index reduced as time goes on during the monitoring period. Bank soaking and frequent surge scouring for a long time led to the loss of plant growth matrix, and the surge which produced by voyaging was the main reason led to the loss at the bottom and the top part being more serious than the middleend section. The loss of plant growth matrix became more serious as time goes by.
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Received: 04 January 2012
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