Ecological Water Consumption Characteristics of

ZHANG Ruiwen; ZHAO Chengyi; WANG Dandan; SHI Fengzhi; ZHENG Jinqiang

doi:10.13870/j.cnki.stbcxb.2019.04.038

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Ecological Water Consumption Characteristics of

更新时间：2025-03-12

- Ecological Water Consumption Characteristics of
- Vol. 33, Issue 4, Pages: 270-278(2019)
- 作者机构：
  
  1. 中国科学院新疆生态与地理研究所, 荒漠与绿洲生态国家重点实验室,乌鲁木齐,830011
  2. 中国科学院大学,北京,100049
  3. 南京信息工程大学土地科学研究中心,南京,210044
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2019.04.038
  CLC： Q945.17;S152.7
- Published：2019
- 稿件说明：
移动端阅览
ZHANG Ruiwen, ZHAO Chengyi, WANG Dandan, et al. Ecological Water Consumption Characteristics of[J]. 2019, 33(4): 270-278.
DOI：

ZHANG Ruiwen, ZHAO Chengyi, WANG Dandan, et al. Ecological Water Consumption Characteristics of[J]. 2019, 33(4): 270-278. DOI： 10.13870/j.cnki.stbcxb.2019.04.038.

摘要

以极端干旱区胡杨林为研究对象，探究不同水分条件下胡杨林土壤水分运动规律和胡杨生态耗水特征。结果表明：HYDRUS-1D模型对极端干旱区胡杨林土壤水分运动和蒸散发过程具有良好的模拟效果。不同水分条件下胡杨林土壤水分运动特征和生态耗水变化差异明显。随着下垫面水分条件趋于湿润，土壤水分含量和湿润锋入渗深度均出现增加，入渗深度分别达到100，120，150 cm。下垫面水分条件改变导致土壤水分存蓄情况发生变化。下垫面水分补给增加的同时胡杨林蒸散发呈明显增加，其中植被蒸腾增加显著。随着水分条件逐渐湿润植被蒸腾占总蒸散比例由55%升至65%。研究显示，随着下垫面水分条件逐渐湿润，极端干旱区胡杨林生态耗水量逐渐增加，其中植物蒸腾消耗是造成水分耗散增加的主要原因。

Abstract

Taking Populus euphratica forests in extremely arid area as the research object

we studied the soil water movement and the ecological water consumption characteristics under different water conditions. The results showed that the HYDRUS-1D model had a good simulation effect on soil water movement and evapotranspiration in forestland in extremely arid regions. The soil water movement and ecological water consumption of Populus euphratica forests under different water conditions were significantly different. As the moisture condition of the underlying surface tended to be wet

the soil moisture content and the wetting front infiltration depth increased

and the infiltration depth reached 100 cm

120 cm and 150 cm

respectively. The changes in moisture conditions on the underlying surface resulted in the changes in soil moisture storages. When the water supply of the underlying surface increased

the evapotranspiration of Populus euphratica forest increased significantly

and the transpiration increased significantly. The percentage of transpiration in the total evapotranspiration gradually increased from 55% to 65% as the moisture conditions became wet. Studies showed that with the gradual wetting of the underlying surface moisture conditions

the ecological water consumption of Populus euphratica forests in the extremely arid regions is gradually increasing

and transpiration is the main reason for the increase of water dissipation.

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