基于遥感技术的降水入渗补给条件空间分异性研究

Research on spatial differentiation of precipitation infiltration recharge condition based on remote sensing technology

降水入渗补给条件在地下水资源研究工作中具有重要的理论和实际意义。利用遥感技术,通过构建基于专家经验知识的评价系统和模型,以30 m×30 m栅格单元、一级岩溶水系统的基岩山区及其碳酸盐岩区3个尺度评价分析北京市各区降水入渗补给条件空间分异性。研究结果表明:在研究区范围内碳酸盐岩区的降水入渗补给条件最优;基岩山区的降水入渗补给条件从优到劣的区域依次为房山、门头沟、延庆、平谷和怀柔;碳酸盐岩区的降水入渗补给条件从优到劣的区域依次是怀柔、门头沟、房山、延庆和平谷;地层岩性与地质构造因子是影响降水入渗补给条件的关键因素。

The precipitation infiltration recharge condition has theoretical and practical significance in the study of groundwater resources. In this study, with the application of remote sensing technology and through constructing evaluation system and model based on expert experience and knowledge, the spatial differentiation of Beijing precipitation infiltration recharge conditions are evaluated at three scales, including grid scale （ 30 m×30 m） , Karst water system bedrock region and its carbonate rock region. The results suggest that carbonate rock areas are conducive to the precipitation infiltration recharge in the whole study area. The precipitation infiltration recharge conditions are in worsening order of Fangshan, Mentougou, Yanqing, Pinggu and Huairou in the five Karst water systems bedrock areas. The precipitation infiltration recharge conditions are in worsening order of Huairou, Mentougou, Fangshan, Yanqing and Pinggu in the five carbonate rock areas, and the lithology and structure seem to be the key factors affecting the conditions of rainfall infiltration recharge.