福州大学 空间数据挖掘和信息共享教育部重点实验室, 福建省空间信息工程研究中心,福建,福州,350002
纸质出版:2017
移动端阅览
王振平, 汪小钦, 曾舒娇, 等. 福建省水土流失现状分析[J]. 水土保持通报, 2017,37(5):169-175.
WANG Zhenping, WANG Xiaoqin, ZENG Shujiao, et al. Analysis of Soil and Water Loss in Fujian Province[J]. Bulletin of Soiland Water Conservation, 2017, 37(5): 169-175.
王振平, 汪小钦, 曾舒娇, 等. 福建省水土流失现状分析[J]. 水土保持通报, 2017,37(5):169-175. DOI: 10.13961/j.cnki.stbctb.2017.05.029.
WANG Zhenping, WANG Xiaoqin, ZENG Shujiao, et al. Analysis of Soil and Water Loss in Fujian Province[J]. Bulletin of Soiland Water Conservation, 2017, 37(5): 169-175. DOI: 10.13961/j.cnki.stbctb.2017.05.029.
[目的
]
运用遥感技术监测福建省水土流失状况,为研究区的水土保持工作提供一定的科学依据。[方法
]
利用2014年Landsat-8 OLI等遥感数据,基于通用土壤流失方程(USLE)定量计算得到研究区的土壤侵蚀量,并运用GIS空间分析和数理统计的方法分析水土流失在地理空间上分布特征。[结果
]
福建省2014年的水土流失总面积为10 939.8 km
2
,总流失率为8.93%,其中以轻度流失为主,占总流失面积的82.3%,境内流失等级为强度及以上的区域主要集中在北部的宁德和南平、南部的漳州和西部的龙岩一带;其中22个水土流失重点县流失面积为4 786.65 km
2
,占全省流失总面积的43.76%,平均流失率为10.54%。[结论
]
水土流失主要发生在海拔高程为200~1 000 m的区域,流失面积有8 954.35 km
2
,占流失总面积的81.85%;坡度与水土流失关系密切,水土流失主要发生在坡度为8°~25°的区域,流失面积有69 871.71 km
2
,占总流失面积的57.23%;容易发生水土流失的土地利用类型是裸地和林地,流失比例分别达到30.99%和9.47%。
[Objective] Remote sensing technology was applied to monitor soil and water loss in Fujian Province
in order to provide certain scientific foundation for soil and water conservation in study area.[Methods] The quantitative computation of soil erosion in the study area based on universal soil loss equation (USLE) and remote sensing data of Landsat-8 OLI at 2014 can be inspected with the GIS spatial analysis and mathematical statistic methods to get the space distribution characteristics of soil and water loss in the field.[Results] The total area and rate of soil and water loss in 2014 of Fujian Province were 10 939.8 km2 and 8.93%
respectively. Mild erosion played a dominant role and covered 82.3% of the erosive area. Areas having intensive erosion or more intensive level mainly concentrated in Ningde
Nanping
Zhangzhou and Longyan. The erosion area of 22 key soil erosion counties was 4 786.65 km2 and the loss rate was 10.54%
accounting for 43.76% of the total erosion area in Fujian Province.[Conclusion] The total 8 954.35 square kilometers erosion area mainly located at altitude of 200~1 000 m and makes up 81.85% of the total erosion area. Slope gradient was found closely associated with soil and water loss
and soil erosion primarily happens in place of 8°~25 ° slope. The loss area on that slope was 69 871.71 km2
accounting for 57.23% of the total erosion area. The bare land and forest land are prone to soil erosion
30.99% and 9.47% of the two lands were in erosion.
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