| 人工补水条件下白洋淀湿地演变研究 |
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| 引用本文：王凯霖,李海涛,吴爱民,李木子,周艺,李文鹏.2018.人工补水条件下白洋淀湿地演变研究[J].地球学报,39(5):549-558. |
| DOI：10.3975/cagsb.2018.071102 |
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| 基金项目:中国地质调查局项目(编号: DD20189142; DD20160239) |
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| 中文摘要:近几十年来, 在自然因素和人类活动的双重作用下, 白洋淀湿地及其周边环境发生了明显变化。本文采用综合识别遥感提取技术, 对近40年来白洋淀湿地面积信息进行提取并分析其变化特征, 在1986—1989年间, 湿地面积增加253.29 km2; 1989—1994年间, 湿地面积减少181.61 km2; 1994—1997, 湿地面积增加158.17 km2; 1997—2004年间, 湿地面积减少170.37 km2; 2004—2016年, 湿地面积增加106.09 km2。根据湿地面积提取结果, 分析湿地面积与地表水位和地下水位的关系, 确定了白洋淀湿地面积变化的主要控制因子为地表水位, 其与白洋淀湿地面积的相关性非常好, 相关系数达0.99; 白洋淀湿地面积与周边区域的地下水位动态变化呈正相关性, 说明湿地渗漏量对周边区域的地下水位动态变化有一定影响。针对白洋淀湿地地表水位, 采用水均衡法, 分析了影响白洋淀地表水位的主控因素, 主要为白洋淀湿地的入淀流量和蒸发蒸腾消耗量。通过白洋淀湿地演变及其影响因素的分析, 初步揭示了白洋淀湿地与水文过程的相互影响机制, 可为制定白洋淀湿地生态修复和水资源可持续利用方案等提供技术支撑和理论参考。 |
| 中文关键词:白洋淀湿地 综合提取 面积变化 地表水位 地下水位 |
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| An Analysis of the Evolution of Baiyangdian Wetlands in Hebei Province with Artificial Recharge |
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| Abstract:In recent decades, Baiyangdian Wetlands and its surrounding environments have changed a lot due to the impacts of natural factors and human activities. In this paper, the comprehensive identification method based on remote sensing technique was adopted to extract the area information of Baiyangdian Wetlands. And the area variation characteristics of Baiyangdian Wetlands were analyzed. The area was increased by 253.29 km2 from 1986 to 1989, reduced by 181.61 km2 from 1989 to 1994, increased by 158.17 km2 from 1994 to 1997, reduced by 170.37 km2 from 1997 to 2004, and increased by 106.09 km2 from 2004 to 2016. According to the extracted results of area, the relationship between wetlands area and surface water level and groundwater level is analyzed. The major controlling factor of Baiyangdian Wetlands area as well as the surface water level was determined by establishing the good relation between area and surface water levels. The correlation coefficient of these two items is 0.99. There is a positive correlation between Baiyangdian Wetlands area and the dynamic change of groundwater level in the surrounding areas, which indicates that the leakage of wetlands has a certain influence on the dynamic change of the groundwater level in the surrounding areas. In order to study the influencing factors of surface water level in Baiyangdian Wetlands, the authors used the water balance method. The main factors which can influence the surface water level a lot are inflows to the wetlands and the evapotranspiration consumption. Through the analysis of the area evolution of Baiyangdian Wetlands and its influencing factors, the impact mechanism between the evolution of Baiyangdian Wetlands and the hydrological process is preliminarily revealed, which can provide technical support and theoretical reference for formulating strategies of ecological restoration and sustainable utilization of water resources in Baiyangdian Wetlands. |
| keywords:Baiyangdian Wetlands comprehensive extraction area variation surface water level groundwater level |
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