【摘要】 沈乌灌域因其特殊的地理位置与气候条件,灌域内湖泊对维持其生态环境良性发展具有重要意义。目前,尚未有对沈乌灌域内湖泊面积历史变迁的研究,为了掌握沈乌灌域湖泊面积的时空变化特征以及有针对性地进行适量补水。基于Landsat与HJ1A/B遥感数据,采用新型水体指数(NWI)结合阈值法、目视解译对1988-2018年沈乌灌域内八大天然湖泊面积进行提取,并结合磴口县气象资料与乌兰布和灌域管理局提供的生态补水、引水量、秋浇水量等资料对灌域内湖泊面积变化进行驱动因子分析。研究结果表明研究区湖泊面积近30 a来一分场海子和冬青湖一直呈直线式扩张趋势,金马湖、纳林湖、镜湖、古月辰湖、砖照井海子和天鹅湖均经历了持续扩张阶段-波动式萎缩阶段-波动式扩张阶段。沈乌灌域内近30 a湖泊面积的变化是气候因素和人为活动的综合影响。更多还原

【Abstract】 Due to its special geographical location and climatic conditions, the water area in Shenwu irrigation area is of great significance to the improvement of its ecological environment. At present, there has been no research on the historical changes of the water area in Shenwu irrigation area. In order to master the spatial-temporal variation characteristics of lake area in Shenwu irrigation area and carry out appropriate water replenishment, in this paper, based on Landsat and HJ1 A/B remote sensing data, new water body index(NWI) combined with threshold value method and visual interpretation was used to extract eight natural lake areas in Shenwu irrigation area from 1988 to 2018. Combined with the meteorological data of Dengkou County and the data of ecological water replenishment, diversion and autumn watering, which was provided by Wulanbuhe irrigation management bureau, the driving factors of the change of water area in irrigation area were analyzed. The results showed that the lake area of YifenchangHaizi lake and Dongqing lake in the study area had been expanding in a straight line in recent 30 yeara, while Jinma lake, Nalin lake, JingHu lake, Guyuechen lake, Zhuanzhaojinghaizi and Tiane lake all experienced the stages of continuous expansion, fluctuation shrinkage and fluctuation expansion. The change of lake area in Shenwu irrigation area in recent 30 years is the comprehensive influence of climate factors and human activities.更多还原