Characteristics of Soil Loss in Abandoned Dreg Field of Production and Construction Project in Lintao County -Taking Xiaojiahe Hydropower Station Ⅱ Project as an Example

WANG Dawei; WANG Li; WANG Xiaoping; QU Furong

doi:10.13961/j.cnki.stbctb.2016.04.010

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Characteristics of Soil Loss in Abandoned Dreg Field of Production and Construction Project in Lintao County -Taking Xiaojiahe Hydropower Station Ⅱ Project as an Example

- Characteristics of Soil Loss in Abandoned Dreg Field of Production and Construction Project in Lintao County -Taking Xiaojiahe Hydropower Station Ⅱ Project as an Example
- Bulletin of Soiland Water Conservation Vol. 36, Issue 4, Pages: 51-55(2016)
- 作者机构：
  
  1. 甘肃农业大学林学院,甘肃,兰州,730070
  2. 甘肃省定西市水土保持研究所,甘肃,定西,743000
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2016.04.010
  CLC：
- Published：2016
- 稿件说明：
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WANG Dawei, WANG Li, WANG Xiaoping, et al. Characteristics of Soil Loss in Abandoned Dreg Field of Production and Construction Project in Lintao County -Taking Xiaojiahe Hydropower Station Ⅱ Project as an Example[J]. Bulletin of Soiland Water Conservation, 2016, 36(4): 51-55.
DOI：

WANG Dawei, WANG Li, WANG Xiaoping, et al. Characteristics of Soil Loss in Abandoned Dreg Field of Production and Construction Project in Lintao County -Taking Xiaojiahe Hydropower Station Ⅱ Project as an Example[J]. Bulletin of Soiland Water Conservation, 2016, 36(4): 51-55. DOI： 10.13961/j.cnki.stbctb.2016.04.010.

摘要

[目的] 探讨水电类生产建设项目弃渣场坡面水土流失特性，为黄土丘陵区生产建设项目水土保持综合治理提供科学的理论依据。[方法] 以甘肃省定西市临洮县2013年降雨数据为依托，通过肖家河水电站二期工程径流小区对不同处理下的水土流失特征进行研究。[结果]（1）临洮县2013年降水量为580.2 mm，定义为平雨年；（2）研究区降雨量和平均降雨强度的乘积与土壤侵蚀量呈线性正相关关系（相关系数大于0.85）；（3）不同植被类型对弃渣场水土流失有影响，其中油松与苜蓿混播能有效降低土壤侵蚀量和径流量；（4）表层土前期含水量对弃渣场土壤流失量有显著影响，下层土前期含水量对弃渣场土壤流失量无显著影响。[结论] 水电类生产建设项目弃渣场土壤流失受降雨量和降雨时间乘积、植被类型和表层土前期土壤含水量的影响。

Abstract

[Objective] The research studied the characteristics of soil and water loss on slopping land of abandoned dreg field of hydropower production and construction projects

which was expected to help us to harness comprehensively the loss of soil and water in loess hilly region. [Methods] The experiment was conducted in 2013 and the corresponding precipitation data were collected in the same year in Linzhao County

Dingxi City of Gansu Province. The loss characteristics of soil and water were demonstrated in runoff plots at Xiaojiahe Hydropower Station Ⅱ project with different treatments. [Results] (1) In 2013

Lintao County had a normal precipitation of 580.2 mm. (2) The product of precipitation and mean rainfall density can be well fitted with the amount of soil erosion with a coefficient greater than 0.85. (3) Different vegetation pattern could affect soil and water loss of abandoned dreg field. The mixed pattern of Pinus tabuliformis and alfalfa effectively reduced the soil erosion and runoff. (4) The initial soil moisture of topsoil had a significant impact on soil and water loss

and the initial subsoil moisture had no significant influence on them. [Conclusion] Soil loss of abandoned dreg field of hydropower production and construction projects were influenced by the product of precipitation and rainfall times

vegetation pattern and initial soil moisture status of topsoil.

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references

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