TITLE:
Exploring the Linkage between Land Use Type and Stream Water Quality of an Estuarine Island Applying GWR Model: A Case Study of Chongming, Shanghai
AUTHORS:
Lei Ding
KEYWORDS:
Estuarine Island, Land Use, Stream Water Quality, Geographical Weight Regression
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.10 No.7,
July
28,
2022
ABSTRACT: To understand the spatial correlations between land use type and water
quality of an estuarine island is particularly essential to maintain its
original ecological environment. Chongming
Island is experiencing a rapid urbanization and agriculture land sprawl during the last decades, especially with the growth of agro-industry and
the extension of old style residences. As a consequence, surface run-off from
agricultural activities and domestic sewage discharge has a various
linkage with stream water quality on the island. This study applied ageographical weight regression model approach to
recognize the significance of the relationship between water quality and
multiple land use. We also evaluated their spatial correlations which normally
hidden from other traditional regression methods. The results reveal that the
water quality of less-developed areas on Chongming Island was easily affected
by land use types compared with other regions, TN, TP, BOD5,
COD were shown as the most significant responses among all the water quality
indicators. Green land and water area had a
reduced effect on nutrients, expansion of industrial land would continuously
make a contribution of pollutants to the water environment. Suggestions
should therefore be taken into consideration during the process of development
planning, in order to prevent water contamination.