Total Suspended Solid Dynamics Revealed by Long-Term Satellite Image Analysis
Total Suspended Solid Dynamics Revealed by Long-Term Satellite Image Analysis
复制标题
长期卫星图像分析揭示的总悬浮固体动力学
DOI：
10.1007/978-981-16-6632-2_18
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
Yoshimura Chihiro
中科院分区：
文献类型：
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作者：
Hoshikawa Keisuke;Fujihara Yoichi;Siev Sokly;Arai Seiya;Nakamura Takashi;Fujii Hideto;Sok Ty;Yoshimura Chihiro
大型浅水湖泊往往表现出高浓度的悬浮固体，由于积极的沉积物再悬浮。利用2003年至2017年从MODIS Aqua获得的每日反射率来确定洞里萨湖表面总悬浮固体（TSS）浓度的主导过程。TSS估算方程的R平方和均方根误差分别为0.92和14.1 mg/L。入流期TSS浓度与水深的关系随湄公河入流量的变化呈逐年波动的趋势。表面/次表层流从洪泛区森林与TSS浓度相对较低稀释的TSS浓度沿着的海岸的湖泊在旱季。此外，在洪水期间较低的水位导致较高的TSS浓度在随后的干旱期间。气候变化和水资源开发可能会在7月至9月的洪水期间降低湄公河的水位;因此，它们可能会增加湖泊中的TSS浓度，特别是在水位最低的3月。
Large shallow lakes often show high concentration of suspended solids due to active sediment resuspension. Daily reflectance amounts obtained from MODIS Aqua from 2003 to 2017 were used to determine dominant processes governing the total suspended solid (TSS) concentration at the surface of Tonle Sap Lake. R squared and the root mean square error of the derived equation for TSS estimation were 0.92 and 14.1 mg/L, respectively. The relation between TSS concentration and water depth in the inflow period fluctuated annually with the amount of inflow from the Mekong River. Surface/subsurface flow from floodplain forests with relatively low TSS concentration diluted the TSS concentration along the shore of the lake during the dry seasons. In addition, a lower water level during flood periods resulted in the higher TSS concentration during the subsequent dry periods. Climate change and water resource development are likely to reduce the water level in the Mekong River during flood periods from July to September; thus, they may increase the TSS concentration in the lake, particularly in March, when the water level is lowest.