InVEST model,soil erosion,soil conservation capacity,natural reserve,Qilian Mountain ,"/> 基于InVEST模型的祁连山国家级自然保护区土壤保持现状与功能
干旱区研究

干旱区研究 ›› 2020, Vol. 37 ›› Issue (1): 150-159.

• 水土资源 • 上一篇    下一篇

基于InVEST模型的祁连山国家级自然保护区土壤保持现状与功能

陈童尧1，贾燕锋1，王佳楠1，张宇2，李萍2，刘楚颖3   

  1. 1. 沈阳农业大学水利学院，辽宁 沈阳 110161；
    2. 中国林业科学研究院森林生态环境与保护研究所，北京 100091；
    3. 北京林业大学人文社会科学学院，北京 100083

  • 收稿日期:2019-03-12 修回日期:2019-05-01 出版日期:2020-01-15 发布日期:2020-01-15
  • 通讯作者: 贾燕锋
  • 作者简介:陈童尧（1994-），男，硕士研究生，主要从事水土保持与生态环境评价. E-mail: 490594042@qq.com
  • 基金资助:
    中央级公益性科研院所基本科研业务费专项资金（CAFYBB2018ZD001,CAFYBB2019ZE003）；国家林业和草原局生物多样性保护重点实验室项目资助

Current Situation and Function of Soil Conservation in National Nature Reserves in the Qilian Mountains Based on InVEST Model

CHEN Tong-yao1, JIA Yan-feng1, WANG Jia-nan1, ZHANG Yu2, LI Ping2, LIU Chu-ying3   

  1. 1. College of Water Conservancy, Shenyang Agricultural University, Shenyang 110161,Liaoning,China;
    2. Institute of Ecological Environment and Protection Research, Chinese Academy of Forestry, Beijing 100091,China;
    3. College of Humanities and Social Sciences, Beijing Forestry University, Beijing 100083,China

  • Received:2019-03-12 Revised:2019-05-01 Online:2020-01-15 Published:2020-01-15

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摘要：

运用InVEST模型，对甘肃祁连山自然保护区土壤保持现状与功能进行了定量评估，分析了不同土地利用、海拔高度、坡度以及土壤类型下的保土状况。结果表明：2015年甘肃祁连山自然保护区土壤侵蚀量与土壤保持量分别为1.67×108 t、4.21×108 t。从侵蚀面积来看，保护区以微度和轻度侵蚀为主，占总面积的63.95%；虽草地的土壤保持能力弱于其他自然植被类型，但草地是土壤保持总量最高的土地利用类型；不同海拔梯度下的土壤保持总量随海拔增加呈现先增后减的趋势，保护区内海拔2 500~3 500 m的土壤保持功能最好；栗钙土的土壤保持量最高，黑毡土在草原土壤类型中土壤保持强度较低；坡度为15°~25°的区域土壤保持量最大，占土壤保持总量的31.93%；甘肃祁连山保护区生态系统减少泥沙淤积和减少土地废弃的价值分别为5.76×108元和1.44×108元，保护区内林草地保肥价值为9.03×1010元。

关键词: InVEST模型, 土壤侵蚀, 土壤保持能力, 自然保护区, 祁连山

Abstract:

 In this paper, the InVEST model was used to quantitatively evaluate the soil conservation function in the Qilian Mountain Nature Reserve in Gansu Province. Moreover, the current situation of soil conservation under different land use modes, altitudes, slopes and soil types was analyzed. The results showed that the soil erosion in the nature reserve in 2015 was significant. The soil erosion and soil conservation were 1.67×108 t and 4.21×108 t respectively. The area of slight soil erosion was dominant and accounted for 63.95% of the total area. Soil conservation capacity of grassland was lower than that of other natural vegetation types, but grassland was the land use type with the highest total soil conservation capacity. The total soil conservation capacity under different elevation gradients increased at first and then decreased with the increase of elevation. Soil conservation function was the best in an elevation range of 2 500-3 500 m a. s. l. in the nature reserve. The soil conservation capacity of chestnut soil was the highest, but that of black felty soil was the lowest among the grassland soil types. The soil conservation capacity in the areas with slope of 15°~25° was the highest and accounted for 31.93% of the total. The values of reducing sediment deposition and discarded cultivated land in ecosystem in the Qilian Mountain Nature Reserve were 5.76×108 yuan and 1.44×108 yuan respectively, and the value of fertilizer conservation in forest and grassland in the nature reserve was 9.03×1010 yuan.

Key words: InVEST model')">

InVEST model, soil erosion, soil conservation capacity, natural reserve, Qilian Mountain