| 束龙仓,王哲,袁亚杰,张凤海,刘武,鲁程鹏.近40年三江平原典型区土地利用变化及其对地下水的影响[J].水利学报,2021,52(8):896-906 |
| 近40年三江平原典型区土地利用变化及其对地下水的影响 |
| Land use change and its impact on groundwater in the typical district of Sanjiang Plain during the past 40 years |
| 投稿时间：2021-03-24 |
| DOI：10.13243/j.cnki.slxb.20210284 |
| 中文关键词: 遥感影像 土地变化/覆被变化 地下水位埋深 城市化 水均衡 |
| 英文关键词: remote-sensing image land use/cover change depth to water table urbanization water balance |
| 基金项目:国家自然科学基金项目（41971027；41572210） |
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| 中文摘要: |
| 三江平原是我国重要的商品粮基地和粮食战略储备基地，地下水作为该地区的主要灌溉水源，其动态备受关注。选取三江平原典型区1980、1990、2000、2010及2018年五期遥感影像数据进行土地利用变化特征分析，探究土地利用类型变化对地下水位埋深的影响和城市化进程、耕地面积变化对流域水均衡状态的影响。结果表明：近40年来水田与城镇用地的面积和周长存在显著的分形特征，稳定性指数由强—弱—强，两种土地利用类型的重心在近40年内发生明显迁移且迁移方向主要为西南—东北—西南，其直接影响流域水均衡状态。土地利用类型的改变使得部分地区地下水补给恢复较慢，造成地下水位埋深不同程度地增大。城市化发展对大气降水入渗补给量影响相对较小，耕地面积变化对灌溉回归补给量影响显著。研究结果可为构建更准确的三江平原典型区地下水数值模型提供科学依据，为三江平原地下水的可持续开发利用提供理论参考。 |
| 英文摘要: |
| Sanjiang Plain is an important commodity grain base and grain strategic reserve base in China. Groundwater is the main irrigation water source in this region, and its dynamic has been paid much attention. The characteristics of land use change were analyzed by using remote sensing image data from typical areas of Sanjiang Plain in 1980, 1990, 2000, 2010 and 2018. The effects of land use type change on depth to water table, the impact of urbanization process and arable land area change on water balance was explored. The results show that there are significant fractal characteristics in the area and periphery of paddy field and urban land,and the stability index is from strong to weak to strong during the past 40 years. The gravity center of the two land use types has shifted significantly in the past 40 years, and the direction of the transfer is mainly from southwest to northeast to southwest, which directly affects the water balance state of the study area. The change of land use type causes the slow recovery of groundwater recharge in some areas and causes the increase of depth to water table in different degrees. Urbanization development has a relatively small effect on precipitation infiltration recharge, while the change of cultivated land area has a significant effect on irrigation regressive recharge. The research results can provide a scientific basis for the construction of a more accurate groundwater numerical model in the typical district of Sanjiang Plain, and provide a theoretical reference for the sustainable development and utilization of groundwater in the Sanjiang Plain. |
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