Abstract

Regional ecological risk assessment (ERA) is more complex than general ERA, as it requires that risk receptors, risk sources, risk exposure, uncertainty and especially spatial heterogeneity all be taken into account. Taking the catchment area along the Weihe River in Shaanxi Province as a study area, a mathematical model of regional ERA was developed and tested on the basis of elementary principles and methods of risk measurement. Through selecting four main risk sources of drought, flood, pollution and soil erosion, with the assistance of geographical information system(GIS) technique, the integrated risk value which was calculated by indices and formulas was classified into five grades (the lowest, lower, moderate, higher and the highest). Each risk area was assigned to one of the five classes. The results can provide quantitatively theoretic basis and data support for environmental management and ecological risk decision-making in the lower Weihe River.

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 call

Disclaimer: 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.