Spatiotemporal variations and risk characteristics of potential non-point source pollution driven by LUCC in the Loess Plateau Region, China

Jiqiang Lyu; Jiqiang Lyu; Jiqiang Lyu; Jiqiang Lyu; Yuanjia Huang; Yuanjia Huang; Yuanjia Huang; Yuanjia Huang; Qiyang Nie; Chen Lu; Chen Lu; Chen Lu; Chen Lu; Yueyan Zhang; Yueyan Zhang; Yueyan Zhang; Yueyan Zhang; Xianghang Fu; Xianghang Fu; Xianghang Fu; Xianghang Fu; Peng Guo; Peng Guo; Pingping Luo; Pingping Luo; Pingping Luo; Pingping Luo

doi:10.3389/fevo.2023.1253328

Frontiers in Ecology and Evolution (Aug 2023)

Spatiotemporal variations and risk characteristics of potential non-point source pollution driven by LUCC in the Loess Plateau Region, China

Jiqiang Lyu,
Jiqiang Lyu,
Jiqiang Lyu,
Jiqiang Lyu,
Yuanjia Huang,
Yuanjia Huang,
Yuanjia Huang,
Yuanjia Huang,
Qiyang Nie,
Chen Lu,
Chen Lu,
Chen Lu,
Chen Lu,
Yueyan Zhang,
Yueyan Zhang,
Yueyan Zhang,
Yueyan Zhang,
Xianghang Fu,
Xianghang Fu,
Xianghang Fu,
Xianghang Fu,
Peng Guo,
Peng Guo,
Pingping Luo,
Pingping Luo,
Pingping Luo,
Pingping Luo

Affiliations

Jiqiang Lyu: School of Water and Environment, Chang’an University, Xi’an, China
Jiqiang Lyu: Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Chang’an University, Ministry of Education, Xi’an, China
Jiqiang Lyu: Xi’an Monitoring, Modelling and Early Warning of Watershed Spatial Hydrology International Science and Technology Cooperation Base, Chang’an University, Xi’an, China
Jiqiang Lyu: Key Laboratory of Eco-hydrology and Water Security in Arid and Semi-arid Regions of the Ministry of Water Resources, Chang’an University, Xi’an, China
Yuanjia Huang: School of Water and Environment, Chang’an University, Xi’an, China
Yuanjia Huang: Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Chang’an University, Ministry of Education, Xi’an, China
Yuanjia Huang: Xi’an Monitoring, Modelling and Early Warning of Watershed Spatial Hydrology International Science and Technology Cooperation Base, Chang’an University, Xi’an, China
Yuanjia Huang: Key Laboratory of Eco-hydrology and Water Security in Arid and Semi-arid Regions of the Ministry of Water Resources, Chang’an University, Xi’an, China
Qiyang Nie: School of Water and Environment, Chang’an University, Xi’an, China
Chen Lu: School of Water and Environment, Chang’an University, Xi’an, China
Chen Lu: Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Chang’an University, Ministry of Education, Xi’an, China
Chen Lu: Xi’an Monitoring, Modelling and Early Warning of Watershed Spatial Hydrology International Science and Technology Cooperation Base, Chang’an University, Xi’an, China
Chen Lu: Key Laboratory of Eco-hydrology and Water Security in Arid and Semi-arid Regions of the Ministry of Water Resources, Chang’an University, Xi’an, China
Yueyan Zhang: School of Water and Environment, Chang’an University, Xi’an, China
Yueyan Zhang: Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Chang’an University, Ministry of Education, Xi’an, China
Yueyan Zhang: Xi’an Monitoring, Modelling and Early Warning of Watershed Spatial Hydrology International Science and Technology Cooperation Base, Chang’an University, Xi’an, China
Yueyan Zhang: Key Laboratory of Eco-hydrology and Water Security in Arid and Semi-arid Regions of the Ministry of Water Resources, Chang’an University, Xi’an, China
Xianghang Fu: School of Water and Environment, Chang’an University, Xi’an, China
Xianghang Fu: Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Chang’an University, Ministry of Education, Xi’an, China
Xianghang Fu: Xi’an Monitoring, Modelling and Early Warning of Watershed Spatial Hydrology International Science and Technology Cooperation Base, Chang’an University, Xi’an, China
Xianghang Fu: Key Laboratory of Eco-hydrology and Water Security in Arid and Semi-arid Regions of the Ministry of Water Resources, Chang’an University, Xi’an, China
Peng Guo: Institude of Soil and Water Conservation, Northwest Agriculture and Forestry University, Yangling, Shaanxi, China
Peng Guo: Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi, China
Pingping Luo: School of Water and Environment, Chang’an University, Xi’an, China
Pingping Luo: Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Chang’an University, Ministry of Education, Xi’an, China
Pingping Luo: Xi’an Monitoring, Modelling and Early Warning of Watershed Spatial Hydrology International Science and Technology Cooperation Base, Chang’an University, Xi’an, China
Pingping Luo: Key Laboratory of Eco-hydrology and Water Security in Arid and Semi-arid Regions of the Ministry of Water Resources, Chang’an University, Xi’an, China

DOI: https://doi.org/10.3389/fevo.2023.1253328
Journal volume & issue: Vol. 11

Abstract

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With increasing human activities, regional substrate conditions have undergone significant changes. These changes have resulted in temporal and spatial variations of non-point source pollution sources, which has a significant impact on the quality of the regional soil, surface water, and groundwater environments. This study focused on the human-disturbed Loess Plateau region and used an enhanced potential non-point-source pollution index (PNPI) model to explore the dynamic changes of regional potential non-point-source pollution (PNP) and the associated risk due to land use and land cover change (LUCC) over the past 31 years. The Loess Plateau region is mainly composed of cultivated land, grassland and forest, which together account for 93.5% of the watershed area. From 1990 to 2020, extensive soil and water conservation measures were implemented throughout the Loess Plateau region, resulting in a significant reduction in the non-point source pollution risk. Using the quantile classification method, the study area’s PNP risk values were categorized into five distinct levels. The results revealed a polarization phenomenon of PNP risk in the region, with an increase in non-point source pollution risk in the human-influenced areas and a rapid expansion of the very high-risk area. However, the non-point source pollution risk in the upstream water source area of the watershed reduced over the study period. In recent years, the rapid urbanization of the Loess Plateau region has been the primary reason for the rapid expansion of the very high PNP risk area throughout the watershed. This study highlights the significant impact of LUCC on the dynamic changes in PNP risk within the Loess Plateau region, providing crucial insights into future conservation and urban planning policies aimed at enhancing the ecological health and environmental quality of the region.

Published in Frontiers in Ecology and Evolution

ISSN: 2296-701X (Online)
Publisher: Frontiers Media S.A.
Country of publisher: Switzerland
LCC subjects: Science: Biology (General): Evolution; Science: Biology (General): Ecology
Website: https://www.frontiersin.org/journals/ecology-and-evolution

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