基于不同雷达参数的滨海湿地水淹区散射特性研究

项目名称： 基于不同雷达参数的滨海湿地水淹区散射特性研究

项目编号： No.41201365

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 地理学

项目作者： 刘丽娟

作者单位： 浙江农林大学

项目金额： 25万元

中文摘要： 淹没程度的时空变化是影响滨海湿地功能的重要因子，很小的水情变化可能影响到植被群落结构、生物多样性、农田盐分以及生态功能变化等。基于遥感的湿地研究中，由于南方地区很难获取无云的光学影像，以及由于植被的覆盖，滨海湿地水淹范围变化在光学影像上难识别等原因，限制了光学遥感对湿地研究的精度。因此，本项目拟选用不受天气、光照影响的微波遥感技术，基于多时相C波段雷达数据，通过对浙江省滨海湿地水淹区散射特性的机理研究，并结合被动光学遥感等数据，得出准确的湿地类型、范围、分布以及多年动态发展趋势，为后续植被群落层次、多样性等重要的湿地生态特征提取提供基础数据，也为气候变化、海平面上升、工业污染等导致的滨海湿地生态环境变化研究提供数据支撑，对浙江省湿地资源保护和恢复，维护生态系统安全及经济可持续发展具有重要的意义。

中文关键词： 多角度；多极化；雷达参数；湿地动态监测；

英文摘要： Temporal and spatial variation of inundated degree is an important factor to affect the function of coastal wetlands. Small hydrological changes that may affect the structure of vegetation communities, biodiversity, agricultural land salinity and ecological function. Hardly to obtain cloudless optical images in the South, as well as vegetation cover which leads to inundated range of coastal wetlands in the optical image difficult to identify and other reasons, the accuracy of the optical remote sensing of wetlands study is limited in the wetlands research based on remote sensing. Therefore, in this project, microwave remote sensing technology with hardly to be disturbed by weather or light will be used. Based on multi-temporal C-band radar data, the back-scattering mechanism will be researched in Zhejiang Province. Further combining passive optical remote sensing data, the accurate wetland type, range, distribution, and years of dynamic development trends will be obtained, which will provide the basic data for the extraction of important wetlands ecological characteristics,such as vegetation community level and diversity,etc., and also provide data support for coastal wetlands ecology environmental change research because of climate change, sea level rise, industrial pollution. Therefore, this research is of gre

英文关键词： Multi-angle；multi-polarization；Radar parameters；Wetland dynamic monitoring；