Spatial Distribution of Stony Desertification and Key Influencing Factors on Different Sampling Scales in Small Karst Watersheds.
Spatial Distribution of Stony Desertification and Key Influencing Factors on Different Sampling Scales in Small Karst Watersheds.
复制标题
喀斯特小流域不同采样尺度石漠化空间分布及关键影响因素
DOI：
10.3390/ijerph15040743
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发表时间：
2018-04-13
影响因子：
--
通讯作者：
Huang X
中科院分区：
文献类型：
--
作者：
Zhang Z;Zhou Y;Wang S;Huang X
喀斯特地区是典型的生态脆弱区，石漠化已成为世界性喀斯特地区最严重的生态和经济问题，也是灾害和贫困的根源。合理的采样尺度对岩溶土壤科学研究具有重要意义。采用基于地理信息系统（GIS）技术和地统计学的网格抽样方法，在不同尺度下研究了喀斯特地区石质荒漠化特征的空间分布及其影响因素。以后寨河流域150 m × 150 m网格采样获得的岩石暴露量为原始数据，选取300 m × 300 m、450 m × 450 m、600 m × 600 m、750 m × 750 m和900 m × 900 m 5个网格尺度作为子样集。结果表明，岩石暴露没有实质性的变化，从一个采样尺度到另一个，而五个子样本的平均值都在整个组的平均值附近波动。随着采样尺度的增大，岩石暴露量的最大值和平均值逐渐减小，变异系数逐渐增大。在150 m × 150 m尺度下，后寨河流域轻度、中度和重度石漠化面积分别为7.81 km2、4.50 km2和1.87 km2。在小尺度上，石质荒漠化的空间变异性受多种因素的影响，而在中尺度上，石质荒漠化的空间变异性受坡度、岩石含量和岩石暴露的共同影响。在大尺度上，石质荒漠化的空间变异主要受土壤厚度和岩石含量的影响。
Karst areas are typical ecologically fragile areas, and stony desertification has become the most serious ecological and economic problems in these areas worldwide as well as a source of disasters and poverty. A reasonable sampling scale is of great importance for research on soil science in karst areas. In this paper, the spatial distribution of stony desertification characteristics and its influencing factors in karst areas are studied at different sampling scales using a grid sampling method based on geographic information system (GIS) technology and geo-statistics. The rock exposure obtained through sampling over a 150 m × 150 m grid in the Houzhai River Basin was utilized as the original data, and five grid scales (300 m × 300 m, 450 m × 450 m, 600 m × 600 m, 750 m × 750 m, and 900 m × 900 m) were used as the subsample sets. The results show that the rock exposure does not vary substantially from one sampling scale to another, while the average values of the five subsamples all fluctuate around the average value of the entire set. As the sampling scale increases, the maximum value and the average value of the rock exposure gradually decrease, and there is a gradual increase in the coefficient of variability. At the scale of 150 m × 150 m, the areas of minor stony desertification, medium stony desertification, and major stony desertification in the Houzhai River Basin are 7.81 km2, 4.50 km2, and 1.87 km2, respectively. The spatial variability of stony desertification at small scales is influenced by many factors, and the variability at medium scales is jointly influenced by gradient, rock content, and rock exposure. At large scales, the spatial variability of stony desertification is mainly influenced by soil thickness and rock content.
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影响因子：
2.6
作者：
Nanni, Marcos Rafael;Povh, Fabrício Pinheiro;Cezar, Everson
通讯作者：
Cezar, Everson
DOI：
10.1111/j.1365-2389.1992.tb00128.x
发表时间：
1992-03-01
期刊：
JOURNAL OF SOIL SCIENCE
影响因子：
--
作者：
WEBSTER, R;OLIVER, MA
通讯作者：
OLIVER, MA
影响因子：
3.9
作者：
Chen, Shengzi;Zhou, Zhongfa;Li, Bo
通讯作者：
Li, Bo
影响因子：
5.8
作者：
Wang, Dian-jie;Shen, You-xin;Li, Yu-hui
通讯作者：
Li, Yu-hui
DOI：
10.2136/sssaj1998.03615995006200050022x
发表时间：
1998-09-01
影响因子：
2.9
作者：
Bergstrom, DW;Monreal, CM;King, DJ
通讯作者：
King, DJ