紧急求救：摘要翻译，在线等

来源：百度知道 编辑：UC知道 时间：2024/06/22 05:25:17
前人对松辽平原盐渍化的研究大多为局部性的，本文运用RS、GIS手段，以航天遥感MSS、TM、ETM为主要信息源，首次对松辽平原完整地貌单元进行多时相、大面积盐渍化遥感动态监测研究，在传统动态变化研究的基础上，建立盐渍化动态度模型、盐渍化重心计算模型、盐渍化变化强度评价模型。明确给出了研究区相应时段内盐渍化的动态变化程度、变化强度分布、重心移动等结论。研究结果表明，近30年来松辽平原盐渍化面积持续增加，总动态度为-1.03%，其中，1975～1989年为-1.67%，1989～2003年为-0.31%。盐渍化重心位于大安与乾安之间，1975～1989年，重心向北东方向移动22.81km，1989～2003年，重心向西南方向移动16.50km。

Predecessors on the Songliao Plain salinization of the study are mostly localized, the paper use of RS, GIS tools to aerospace remote sensing MSS, TM, ETM as the main source of information, the first time on the Songliao Plain integrity of the landscape unit for a long time, Salinization of large areas of remote sensing monitoring developments, changes in the traditional research established on the basis of salinization of dynamic model, the salinization of the focus model, the salinity changes in intensity evaluation model. Clearly presented the study area corresponding periods in the salinity level of dynamic change, changes in intensity distribution, such as moving the focus of conclusions. The results show that over the past 30 years salinization of Songliao Plain area continued to increase, the total for the dynamic of -1.03 percent, which, from 1975 to 1989 was -1.67%, from 1989 to 2003 to -0.31%. Salinization in the center of gravity and stem the Taean between 1975 to 1989, t