Remote Sensing Quantitative Research on Soil Erosion in the Upper Reaches of the Minjiang River
The upper reaches of the Minjiang River are an important ecological barrier to the upper reaches of the Yangtze River and Chengdu Plain. They are also the water resources of Chengdu Plain. To protect the headwater ecosystems, it is necessary to carry out quantitative research on soil erosion in this...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2022-07-01
|
| Series: | Frontiers in Earth Science |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2022.930535/full |
| _version_ | 1818109118289805312 |
|---|---|
| author | Deng Bing Deng Bing Shi Lei |
| author_facet | Deng Bing Deng Bing Shi Lei |
| author_sort | Deng Bing |
| collection | DOAJ |
| description | The upper reaches of the Minjiang River are an important ecological barrier to the upper reaches of the Yangtze River and Chengdu Plain. They are also the water resources of Chengdu Plain. To protect the headwater ecosystems, it is necessary to carry out quantitative research on soil erosion in this area. This study mainly applies the USLE model to quantitatively evaluate the spatial distribution of ecosystem services on soil erosion and soil conservation. The evaluation is based on the following data: remote sensing image, meteorological radiation data, DEM, soil types, physical and chemical properties of the soil, vegetation types, and land use status. With advanced Earth observation technology, satellite remote sensing images about terrestrial vegetation and other evaluation parameters can be obtained in real time. The seasonal changes in vegetation coverage and the physical and chemical properties of soil have been fully considered. The results show that 1) the value of rainfall erosivity factor (R) is between 85.02 and 588.69 MJ•mm/(hm2•h•a), and its spatial distribution is consistent with that of annual average precipitation. 2) Soil erodibility factor (K) is between 0.12 and 0.30 (t hm2 h) •(hm2 MJ mm), showing zonal distribution, and is related to soil types. 3) Slope length and gradient factor (LS) range from 0.03 to 46.16. It is positively correlated with topographic relief. 4) Soil conservation measure factor (P) ranges from 0 to 1 and is determined by the land use and coverage. 5) Rainfall has a dominant impact on soil erosion, and the study area with violent and intense erosion reaches 17,302.17 km2, accounting for 69.81% of the total area. The soil conservation amount (T) in the study area is 283.45 million tons, and the ecosystem services are worth 434.48 million yuan. 6) RS and GIS techniques enable quick estimation. However, this assessment contains considerable uncertainty. It is still hard to reveal the physical process of soil erosion with empirical models. |
| first_indexed | 2024-12-11T02:26:10Z |
| format | Article |
| id | doaj.art-17e45a0a0a4e4bba80132975be604252 |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-12-11T02:26:10Z |
| publishDate | 2022-07-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj.art-17e45a0a0a4e4bba80132975be6042522022-12-22T01:23:54ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632022-07-011010.3389/feart.2022.930535930535Remote Sensing Quantitative Research on Soil Erosion in the Upper Reaches of the Minjiang RiverDeng Bing0Deng Bing1Shi Lei2School of Management Science, GuiZhou University of Finance and Economics, Guiyang, ChinaGuizhou Province Key Laboratory of Ecological Protection and Restoration of Typical Plateau Wetlands, Guizhou University of Engineering Science, Guizhou, ChinaSpace Star Technology Co., Ltd., Chengdu, ChinaThe upper reaches of the Minjiang River are an important ecological barrier to the upper reaches of the Yangtze River and Chengdu Plain. They are also the water resources of Chengdu Plain. To protect the headwater ecosystems, it is necessary to carry out quantitative research on soil erosion in this area. This study mainly applies the USLE model to quantitatively evaluate the spatial distribution of ecosystem services on soil erosion and soil conservation. The evaluation is based on the following data: remote sensing image, meteorological radiation data, DEM, soil types, physical and chemical properties of the soil, vegetation types, and land use status. With advanced Earth observation technology, satellite remote sensing images about terrestrial vegetation and other evaluation parameters can be obtained in real time. The seasonal changes in vegetation coverage and the physical and chemical properties of soil have been fully considered. The results show that 1) the value of rainfall erosivity factor (R) is between 85.02 and 588.69 MJ•mm/(hm2•h•a), and its spatial distribution is consistent with that of annual average precipitation. 2) Soil erodibility factor (K) is between 0.12 and 0.30 (t hm2 h) •(hm2 MJ mm), showing zonal distribution, and is related to soil types. 3) Slope length and gradient factor (LS) range from 0.03 to 46.16. It is positively correlated with topographic relief. 4) Soil conservation measure factor (P) ranges from 0 to 1 and is determined by the land use and coverage. 5) Rainfall has a dominant impact on soil erosion, and the study area with violent and intense erosion reaches 17,302.17 km2, accounting for 69.81% of the total area. The soil conservation amount (T) in the study area is 283.45 million tons, and the ecosystem services are worth 434.48 million yuan. 6) RS and GIS techniques enable quick estimation. However, this assessment contains considerable uncertainty. It is still hard to reveal the physical process of soil erosion with empirical models.https://www.frontiersin.org/articles/10.3389/feart.2022.930535/fullsoil erosionUSLE modelremote sensingLandsat8violent and intense erosion |
| spellingShingle | Deng Bing Deng Bing Shi Lei Remote Sensing Quantitative Research on Soil Erosion in the Upper Reaches of the Minjiang River Frontiers in Earth Science soil erosion USLE model remote sensing Landsat8 violent and intense erosion |
| title | Remote Sensing Quantitative Research on Soil Erosion in the Upper Reaches of the Minjiang River |
| title_full | Remote Sensing Quantitative Research on Soil Erosion in the Upper Reaches of the Minjiang River |
| title_fullStr | Remote Sensing Quantitative Research on Soil Erosion in the Upper Reaches of the Minjiang River |
| title_full_unstemmed | Remote Sensing Quantitative Research on Soil Erosion in the Upper Reaches of the Minjiang River |
| title_short | Remote Sensing Quantitative Research on Soil Erosion in the Upper Reaches of the Minjiang River |
| title_sort | remote sensing quantitative research on soil erosion in the upper reaches of the minjiang river |
| topic | soil erosion USLE model remote sensing Landsat8 violent and intense erosion |
| url | https://www.frontiersin.org/articles/10.3389/feart.2022.930535/full |
| work_keys_str_mv | AT dengbing remotesensingquantitativeresearchonsoilerosionintheupperreachesoftheminjiangriver AT dengbing remotesensingquantitativeresearchonsoilerosionintheupperreachesoftheminjiangriver AT shilei remotesensingquantitativeresearchonsoilerosionintheupperreachesoftheminjiangriver |