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space, the local situation and causes of water pollution, and the spatial differences
in the impact of urbanization on water quality between watersheds with differ-
ent urbanization levels. All these information detected by GWR are important for
watershed conservation and management.
This study suggests that GWR can also serve as a useful geospatial tool for
environmental research and management in other fields than water environment.
Environmental protection agencies and researchers are all concerned with how nat-
ural environment affected by varied natural and anthropogenic factors, such as soil,
climate, topography, vegetation, land use, economic activities, and policies, and try
to understand the interrelations between these factors and environment. However, all
these factors are not uniform across space, and so spatial non-stationarity might exist
in the relationships between these factors and environment, which can be examined
by GWR technique. The spatially varying relationships found by GWR can help
analyze and detect different situations and causes of environmental issues for differ-
ent specific local areas, and then local environmental protection agencies and policy
makers will be able to adjust environmental policies and techniques to fit the local
environment. Thus, GWR can serve as a useful geospatial tool for policy makers,
regional and local agencies, and researchers to unveil the local pollution causes,
to improve the understanding of local pollution status, and to adopt appropriate
environmental policies suitable to the local environment issues.
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