Abstract
AbstractThe water and soil environmental vulnerability in arid areas is mainly affected by vegetation, hydrology, terrain, and climate. To accurately evaluate the water and soil environmental vulnerability and its evolution in the Jingtaichuan Pumping Irrigation District in China, this paper, taking 1994, 2006, and 2018 as typical years, selects 13 index factors that directly or indirectly drive the water and soil environmental evolution in this area, and adopts the cloud theory and analytic hierarchy process to determine the weight of each index factor. Spatial analysis technique and supervised classification were used to obtain and standardize the spatial distribution raster maps of each index factor. The multi-source data fusion was performed according to the index weight to analyze the evolution characteristics of soil and water environmental vulnerability. The results showed that soil salinity, vegetation coverage, and land use type have a significant impact on the water and soil environmental vulnerability in this irrigation area, and most of the area is at mild risk. High risk mainly occurs in closed hydrological units in the eastern part of the irrigation area. From 1994 to 2018, the evolution process can be divided into two stages, namely the ‘environmental deterioration stage’ and the ‘environmental restoration stage’. The results showed that the water and soil environment of the irrigation area is developing in a healthy way.
Highlights
Water and soil environment is an indispensable carrier for organisms to carry out life activities
It can be seen that soil salinity, vegetation coverage, and land use type are the main index factors that affect the vulnerability of the water and soil environment on regional scale and its temporal and spatial differentiation process, followed by three moisture factors, and three hydrometeorological factors
To clarify the evolution trend of the water and soil environmental vulnerability in Jingdian Irrigation District and reveal the main influencing factors driving the evolution of the water and soil environment in the irrigation area, 13 key factors were selected from four aspects: soil vegetation, hydrology, terrain, and climate, the corresponding long-term monitoring data and test data were expressed using space technology, and the accuracy of the expression results was verified
Summary
Water and soil environment is an indispensable carrier for organisms to carry out life activities. Previous studies revealed that the vulnerability of the soil and water environment in some areas has undergone fundamental changes (Setegn et al 2009; Angelovicová & Fazekašová 2014; Lamsal et al 2017; Felix et al 2019; Xu et al 2019). These changes are mainly caused by vegetation, hydrology, terrain, and climate, with obvious manifestations. It is necessary to reveal the influencing process and driving mechanism of various factors on the water and soil environmental vulnerability at the spatial and temporal scale through field experiments, long-term monitoring data, and space remote sensing data, which can contribute to the study of the evolution of water and soil environment in arid areas
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
