Sediment Yield in Dam-Controlled Watersheds in the Pisha Sandstone Region on the Northern Loess Plateau, China

Soil erosion has become the dominant environmental issue endangering sustainable development in agriculture and the ecosystem on the Loess Plateau. Determination of watershed soil erosion rates and sediment yields is essential for reasonable utilization of water resources and soil loss control. In t...

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Autores principales:	Fabing Xie, Guangju Zhao, Xingmin Mu, Peng Tian, Peng Gao, Wenyi Sun
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	check dam UAVs and SfM SEDD model sediment yield Pisha sandstone region Agriculture S
Acceso en línea:	https://doaj.org/article/d543bae8d16b40549ae973df95e4527e
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id	oai:doaj.org-article:d543bae8d16b40549ae973df95e4527e
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spelling	oai:doaj.org-article:d543bae8d16b40549ae973df95e4527e2021-11-25T18:10:10ZSediment Yield in Dam-Controlled Watersheds in the Pisha Sandstone Region on the Northern Loess Plateau, China10.3390/land101112642073-445Xhttps://doaj.org/article/d543bae8d16b40549ae973df95e4527e2021-11-01T00:00:00Zhttps://www.mdpi.com/2073-445X/10/11/1264https://doaj.org/toc/2073-445XSoil erosion has become the dominant environmental issue endangering sustainable development in agriculture and the ecosystem on the Loess Plateau. Determination of watershed soil erosion rates and sediment yields is essential for reasonable utilization of water resources and soil loss control. In this study, we employed unmanned aerial vehicles (UAVs) and structure-from-motion (SfM) photogrammetry to determine the sediment yields in 24 dam-controlled watersheds in the Pisha sandstone region of the northern Loess Plateau. High differences in total sediment were trapped before the check dams due to their running periods and sediment yields. The estimated specific sediment yield ranged from 34.32 t/(ha∙a) to 123.80 t/(ha∙a) with an average of 63.55 t/(ha∙a), which indicated that the Pisha sandstone region had an intense soil erosion rate. Furthermore, the modified Sediment Distributed Delivery (SEDD) model was applied to identify the erosion-prone areas in the watersheds, and the sediment retained in the check dams were used for model calibration. The performance of the model was acceptable, and the modeling results indicated that the steep Pisha sandstone was the major sediment source for the watersheds, accounting for approximately 87.37% of the sediment yield. Catchment area, erosive precipitation, and badland proportion were the key factors for sediment yield in the dam-controlled watersheds of the Pisha sandstone region, according to multiple regression analyses. These findings indicated that the modified SEDD model is very efficient in identifying spatial heterogeneities of sediment yield in the watershed but requires comprehensive calibration and validation with long-term observations. The Pisha sandstone region is still the key area of soil erosion control in the Loess Plateau, which needs more attention for soil and water conservation due to high sediment yield.Fabing XieGuangju ZhaoXingmin MuPeng TianPeng GaoWenyi SunMDPI AGarticlecheck damUAVs and SfMSEDD modelsediment yieldPisha sandstone regionAgricultureSENLand, Vol 10, Iss 1264, p 1264 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	check dam UAVs and SfM SEDD model sediment yield Pisha sandstone region Agriculture S
spellingShingle	check dam UAVs and SfM SEDD model sediment yield Pisha sandstone region Agriculture S Fabing Xie Guangju Zhao Xingmin Mu Peng Tian Peng Gao Wenyi Sun Sediment Yield in Dam-Controlled Watersheds in the Pisha Sandstone Region on the Northern Loess Plateau, China
description	Soil erosion has become the dominant environmental issue endangering sustainable development in agriculture and the ecosystem on the Loess Plateau. Determination of watershed soil erosion rates and sediment yields is essential for reasonable utilization of water resources and soil loss control. In this study, we employed unmanned aerial vehicles (UAVs) and structure-from-motion (SfM) photogrammetry to determine the sediment yields in 24 dam-controlled watersheds in the Pisha sandstone region of the northern Loess Plateau. High differences in total sediment were trapped before the check dams due to their running periods and sediment yields. The estimated specific sediment yield ranged from 34.32 t/(ha∙a) to 123.80 t/(ha∙a) with an average of 63.55 t/(ha∙a), which indicated that the Pisha sandstone region had an intense soil erosion rate. Furthermore, the modified Sediment Distributed Delivery (SEDD) model was applied to identify the erosion-prone areas in the watersheds, and the sediment retained in the check dams were used for model calibration. The performance of the model was acceptable, and the modeling results indicated that the steep Pisha sandstone was the major sediment source for the watersheds, accounting for approximately 87.37% of the sediment yield. Catchment area, erosive precipitation, and badland proportion were the key factors for sediment yield in the dam-controlled watersheds of the Pisha sandstone region, according to multiple regression analyses. These findings indicated that the modified SEDD model is very efficient in identifying spatial heterogeneities of sediment yield in the watershed but requires comprehensive calibration and validation with long-term observations. The Pisha sandstone region is still the key area of soil erosion control in the Loess Plateau, which needs more attention for soil and water conservation due to high sediment yield.
format	article
author	Fabing Xie Guangju Zhao Xingmin Mu Peng Tian Peng Gao Wenyi Sun
author_facet	Fabing Xie Guangju Zhao Xingmin Mu Peng Tian Peng Gao Wenyi Sun
author_sort	Fabing Xie
title	Sediment Yield in Dam-Controlled Watersheds in the Pisha Sandstone Region on the Northern Loess Plateau, China
title_short	Sediment Yield in Dam-Controlled Watersheds in the Pisha Sandstone Region on the Northern Loess Plateau, China
title_full	Sediment Yield in Dam-Controlled Watersheds in the Pisha Sandstone Region on the Northern Loess Plateau, China
title_fullStr	Sediment Yield in Dam-Controlled Watersheds in the Pisha Sandstone Region on the Northern Loess Plateau, China
title_full_unstemmed	Sediment Yield in Dam-Controlled Watersheds in the Pisha Sandstone Region on the Northern Loess Plateau, China
title_sort	sediment yield in dam-controlled watersheds in the pisha sandstone region on the northern loess plateau, china
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/d543bae8d16b40549ae973df95e4527e
work_keys_str_mv	AT fabingxie sedimentyieldindamcontrolledwatershedsinthepishasandstoneregiononthenorthernloessplateauchina AT guangjuzhao sedimentyieldindamcontrolledwatershedsinthepishasandstoneregiononthenorthernloessplateauchina AT xingminmu sedimentyieldindamcontrolledwatershedsinthepishasandstoneregiononthenorthernloessplateauchina AT pengtian sedimentyieldindamcontrolledwatershedsinthepishasandstoneregiononthenorthernloessplateauchina AT penggao sedimentyieldindamcontrolledwatershedsinthepishasandstoneregiononthenorthernloessplateauchina AT wenyisun sedimentyieldindamcontrolledwatershedsinthepishasandstoneregiononthenorthernloessplateauchina
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Sediment Yield in Dam-Controlled Watersheds in the Pisha Sandstone Region on the Northern Loess Plateau, China

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