论文部分内容阅读
运用水文地貌理论,选择湿地的坡度、平均宽度、土壤质地和表面糙率四个物理指标,以渤海湾潮间带为研究案例,建立了潮间带湿地稳定岸线功能评价模型。分析了1954年到2000年间渤海湾潮间带湿地岸线的动态变化,利用潮间带湿地稳定岸线功能评价模型进行了评价。结果表明:以20世纪50年代为基准年,稳定岸线功能指数从0.9下降至0.75。围海造地和滩涂养殖导致湿地面积减少,宽度下降,是其功能退化的主要原因。运用本模型可以快速地反映一定区域的海岸带湿地生态退化程度。
By using hydrology and geomorphology theory, four physical indexes of slope, average width, soil texture and surface roughness of wetland were selected. Taking Bohai Bay intertidal zone as a case study, a stable shoreline function evaluation model of intertidal wetland was established. The dynamic changes of coastline in the intertidal zone of Bohai Bay from 1954 to 2000 were analyzed. The evaluation of the coastline wetland function evaluation model was carried out. The results show that with the 1950s as the base year, the stable coastline functional index has dropped from 0.9 to 0.75. Land reclamation and tidal flats breeding lead to a decrease in wetland area and a decrease in width, which is the main reason for its degeneration. The model can quickly reflect the degree of ecological degradation of coastal wetlands in a certain area.