【摘要】 以Landsat系列卫星影像为主要数据源,结合水文数据、专题数据和其他相关研究文献资料,选取梁子湖在1970年左右、1980年左右、1990年左右、2000年左右、2010年左右、2016年左右6个不同时期的高、低水位对应的总共12幅影像,利用归一化水体指数和改进型归一化水体指数提取湖体边界,并计算其面积与蓄洪容积,结合梁子湖区域人类活动影响,分析其湖泊面积与蓄洪容积的变化趋势。结果表明:①梁子湖水体面积提取结果和蓄洪容积计算结果的相对误差均在10%以内;②自1973年以来的45年内,梁子湖水面面积和蓄洪容积整体上呈先减小、后增大的变化趋势,与人类活动影响具有密切联系。更多还原

【Abstract】 Taking Landsat series satellite imagery as the main data source,combined with hydrological data,thematic data and other related research literature;twelve images of Liangzi Lake corresponds to periods of high and low water level around 1970,1980,1990,2000,2010 and 2016 are selected to extract the lake boundary using normalized water body index and the modified normalized index and calculate the lake area and flood storage volume. In addition,combined with the impact of human activities in the Liangzi Lake area,the change trend of lake area and flood storage volume is analyzed. The results show that: ① the relative errors of the extracted water body area and the calculated storage volume of Liangzi Lake are within 10%;②Within 45 years since 1973,the water surface area and flood storage volume of Liangzi Lake have decreased in the beginning and then increased,which is closely related to the impact of human activities.更多还原