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晋西黄土区切沟对其上方集水区内土壤水分的影响
引用本文:施政乐,张建军,申明爽,刘畅,胡亚伟,徐勤涛. 晋西黄土区切沟对其上方集水区内土壤水分的影响[J]. 水土保持学报, 2022, 36(3): 71-76
作者姓名:施政乐  张建军  申明爽  刘畅  胡亚伟  徐勤涛
作者单位:1. 北京林业大学水土保持学院, 北京 100083;2. 山西吉县森林生态系统国家野外科学观测研究站, 山西 吉县 042200;3. 北京林业大学水土保持国家林业局重点实验室, 北京 100083;4. 林业生态工程教育部工程研究中心(北京林业大学), 北京 100083
基金项目:国家重点研究计划项目(2022YFE0104700)
摘    要:为掌握黄土高原切沟对其上方集水区内土壤水分的影响,选取晋西黄土区典型切沟上方的集水区为研究对象,采用土钻法定期测量0—10 m土层的土壤水分,探讨集水区内不同地貌部位的土壤水分状况。结果表明:(1)集水区内土壤水分状况受距离切沟远近和地貌部位的共同影响。(2)集水区内距离切沟1 m处的蓄水量显著低于距离切沟3,6 m处的蓄水量(P<0.05),集水区内洼地的蓄水量大于坡面。(3)集水区内6个采样点浅层含水量随时间变化剧烈,深层含水量随时间变化小。(4)切沟对其上方集水区内土壤水分的水平影响距离为1~3 m,距切沟1 m处,影响深度最深可达7 m,距切沟3 m处,影响深度为2 m。在未来开展切沟治理中,建议在距离切沟1 m范围内密植低耗水的耐旱灌木或草本,利用密植的植物增加地面糙率,降低水流流速,并利用植物根系网络土体,增加抗冲性,从而起到防治切沟溯源侵蚀。

关 键 词:切沟  沟头  土壤水分  影响范围  晋西黄土区
收稿时间:2021-10-12

Effects of Gully on Soil Water Content in the Catchment Area Above in the Loess Region of Western Shanxi Province
SHI Zhengle,ZHANG Jianjun,SHEN Mingshuang,LIU Chang,HU Yawei,XU Qintao. Effects of Gully on Soil Water Content in the Catchment Area Above in the Loess Region of Western Shanxi Province[J]. Journal of Soil and Water Conservation, 2022, 36(3): 71-76
Authors:SHI Zhengle  ZHANG Jianjun  SHEN Mingshuang  LIU Chang  HU Yawei  XU Qintao
Affiliation:1. School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083;2. National Station for Forest Ecosystem Research in Ji County, Ji County, Shanxi 042200;3. State Forestry Administration on Soil and Water Conservation, Beijing Forestry University, Beijing 100083;4. Center of Forestry Ecological Engineering Ministry of Education, Beijing Forestry University, Beijing 100083
Abstract:We selected catchment area above typical gully in the loess region of western Shanxi Province to study effects of gully on soil water content in the catchment area above in the Loess Plateau. The soil water content in a profile of 10 m was measured by soil core method and we discussed the soil moisture status of different landforms in the catchment area. The results showed that:(1) The soil moisture status in the catchment area was affected by the distance from the gully and the landform. (2) Soil water storage at 1 m from the head of the gully was significantly lower than that at 3 and 6 m. Soil water storage was higher in the depression than in the slope. (3)The shallow soil water content of 6 sampling points changed sharply with time, and the deep layer had little changes. (4)The horizontal influence distance of gully on soil water content in catchment area was 1~3 m, for gully in catchment area, 7 m for influence depth. It was suggested that drought-tolerant shrubs and herbs with low water consumption should be densely planted near the gully to increase the surface roughness and reduce the water flow velocity. And the plant roots could hold the soil and increase the anti-impact property to control gully erosion.
Keywords:gully  gully head  soil water  the affected range  Loess Region of Western Shanxi Province
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