| 贵州贞丰—关岭花江喀斯特石漠化地区土壤厚度的空间分布特征 |
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| 引用本文： | 邓大鹏,刘琦,卢耀如,闫钇全.贵州贞丰—关岭花江喀斯特石漠化地区土壤厚度的空间分布特征[J].水文地质工程地质,2023,50(1):197-206. |
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| 作者姓名： | 邓大鹏 刘琦 卢耀如 闫钇全 |
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| 作者单位： | 1.同济大学土木工程学院地下建筑与工程系，上海 200092 |
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| 基金项目： | 国家自然科学基金项目（41772292）；国家重点研发计划（2016YFC0502603） |
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| 摘 要： | 土壤厚度与石漠化发展程度有着密切的关系，土壤也是石漠化地区生态恢复以及农业生产的基础。为了研究典型高原峡谷中-强度石漠化地区的土壤厚度空间分布规律，在土壤厚度野外调查的基础上，利用地统计学方法分析了贵州典型石漠化地区——贞丰—关岭花江小流域土壤厚度空间分布特征及主要影响因素。结果表明:（1）研究区土壤平均厚度仅为26 cm，土壤平均厚度表现为坡耕地>荒地>林地；（2）土壤厚度空间变异性以强度为主，荒地的土壤厚度空间分布连续程度优于林地和坡耕地，林地的土壤厚度空间分布有明显突变性，坡耕地的土壤厚度具有点状分布特征，有耕作物附近土壤厚度较大；（3）土壤厚度与海拔、基岩裸露率、坡度之间均有明显负相关关系；（4）自然和人为因素综合影响下的土壤强侵蚀是研究区土壤厚度分布极为不均的主要原因，对该区域石漠化的治理可以采用工程措施与生物措施相结合的方法。研究结果对研究区石漠化因地制宜地防治及其他地区水土流失防治、生态恢复、农业合理生产具有一定的参考价值。
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| 关 键 词： | 石漠化 高原峡谷 土地利用类型 土壤厚度 空间分布 |
| 收稿时间： | 2021-11-02 |
Spatial distribution characteristics of soil thickness in the Zhenfeng-GuanlingHuajiang karst rocky desertification area in Guizhou Province |
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| Institution: | 1.Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China2.Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education（Tongji University）, Shanghai 200092, China |
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| Abstract: | Soil thickness is closely related to the development degree of rocky desertification, and soil is the basis of ecological restoration and agricultural production in karst rocky desertification areas. In order to examine the spatial distribution law of soil thickness in typical plateau rocky desertification areas, by combining field investigation of soil thickness with geostatistic methods, this paper analyzes the spatial distribution characteristics of soil thickness and its influencing factors in the karst plateau gorge area of the Zhenfeng-Guanling Huajiang small watershed in Guizhou. The results show that the average soil thickness in the study area is only 26 cm, and the average thickness of soil is: Slope farmland > wasteland > forest land. The spatial variability of soil thickness in the study area is mainly intensity. The spatial distribution continuity of soil thickness in wasteland is better than that of forest land and slope farmland. The spatial distribution of soil thickness in forest land has obvious mutation. The soil thickness in slope farmland is characterized by point distribution, and the soil thickness near crops is large. There are significant negative correlations between soil thickness and altitude, bedrock exposure rate and slope. Serious soil erosion under natural and man-made effect is the main reason for the uneven distribution of soil thickness in the study area, and the combination of engineering measures and biological measures can be used to control rocky desertification in the study area. The results are of guiding significance for the control of rocky desertification in the study area and control of soil erosion, ecological restoration and rational agricultural production in other similar areas. |
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