Spatial-Temporal Variations of Water Quality and Its Relationship to Land Use and Land Cover in Beijing, China

Abstract Studies in water quality management have indicated significant relationships between land use/land cover (LULC) variables and water quality parameters. Thus, understanding this linkage is essential in protecting and developing water resources. This article extends the conventional geographical weighted regression (GWR) to a temporal version in order to take both spatial and temporal variations of such linkages into account, which has been ignored by many of the previous efforts. The approach has been evaluated for total nitrates and nitrites' concentration as the case study. For this, observations of 45 water quality sampling stations were examined in a time interval of 20 years (1992–2011), and the linkages between LULC variables and NO2 + NO3 concentration were extracted through Pearson correlation coefficient as a global regression model, the conventional geographic weighted regression, and the proposed spatio-temporal weighted regression (STWR). Comparing the results based on two global criteria of goodness-of-fitness (R2) and residual sum of squares (RSS) verifies that the simultaneous consideration of spatial and temporal variations by STWR substantially improves the results.

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Long-term effects of land use/land cover change on surface runoff in urban areas of Beijing, China

Journal of Applied Remote Sensing ◽

10.1117/1.jrs.8.084596 ◽

2013 ◽

Vol 8 (1) ◽

pp. 084596 ◽

Cited By ~ 16

Author(s):

Zhongchang Sun ◽

Xinwu Li ◽

Wenxue Fu ◽

Yingkui Li ◽

Dongsheng Tang

Keyword(s):

Land Use ◽

Land Cover ◽

Land Cover Change ◽

Surface Runoff ◽

Urban Areas ◽

Land Use Land Cover ◽

Long Term Effects ◽

Effects Of Land Use ◽

Beijing China

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Development of Chemical Index as a Measure of In-Stream Water Quality in Response to Land-Use and Land Cover Changes

Water Air & Soil Pollution ◽

10.1007/s11270-006-9090-5 ◽

2006 ◽

Vol 174 (1-4) ◽

pp. 161-179 ◽

Cited By ~ 66

Author(s):

T. Tsegaye ◽

D. Sheppard ◽

K. R. Islam ◽

W. Tadesse ◽

A. Atalay ◽

...

Keyword(s):

Water Quality ◽

Land Use ◽

Land Cover ◽

Stream Water ◽

Land Cover Changes ◽

Stream Water Quality ◽

Chemical Index

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Impact of Changes in Land Use and Land Cover in the Contribution Basin of Doutor João Penido Water Supply Reservoir of Juiz de Fora, MG, Brazil

Journal of Management and Sustainability ◽

10.5539/jms.v11n1p108 ◽

2021 ◽

Vol 11 (1) ◽

pp. 108

Author(s):

Juliana Nazareth de Lana ◽

Márcio de Oliveira ◽

Vanessa Romario de Paula ◽

Cézar Henrique Barra Rocha

Keyword(s):

Water Quality ◽

Land Use ◽

Land Cover ◽

Water Supply ◽

Quality Parameters ◽

E Coli ◽

The City ◽

Water Supply Reservoirs ◽

Limnological Parameters

Changes in the land use and land cover in areas adjacent to water reservoirs directly affect the quality of this water. This research presents a study on the water quality in the basin of one of the most important public water supply reservoirs in the city of Juiz de Fora, Minas Gerais. The main objective of this study was to analyze the behavior of limnological parameters and the correlation with land use and land cover in the contribution basin of the Doutor João Penido reservoir (CBJPR). The methodology was based on the analysis of water quality parameters, related to water samples collected from 2012 to 2015. Six sampling points were chosen from different locations: spring, medium course, main tributaries of the reservoir and the reservoir catchment. The parameters analyzed were turbidity, total solids (TS), oxygen consumed (OC), dissolved oxygen (DO), electrical conductivity, total nitrogen (TN), total phosphorus (TP), E. Coli, temperature, pH and total dissolved solids (TDS). The Kendall’s tau test was used to analyze the correlations between the parameters of water quality, land use and land cover in the CBJPR. In general, measured parameters showed better results in spring and in reservoir catchment, showing a worse quality of the water along the tributaries and the dilution power of the reservoir. The correlations pointed to the need for protection and preservation of forests in strategic locations to ensure good water quality.

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Combined impact of Climate change and Land use on water quality in the mid-21st century: A modelling study for a highly industrialized stretch of Ganga River

10.5194/egusphere-egu21-795 ◽

2021 ◽

Author(s):

Sneha Santy ◽

Pradeep Mujumdar ◽

Govindasamy Bala

Keyword(s):

Climate Change ◽

Water Quality ◽

Land Use ◽

Land Cover ◽

General Circulation ◽

General Circulation Models ◽

Ganga River ◽

Quality Analysis ◽

Future Climate Change ◽

Land Use Land Cover

<p>High industrial discharge, excessive agricultural activities, untreated sewage disposal make the Kanpur region one of the most contaminated stretches of the Ganga river. This study analyses water quality for the combined future climate change and land use land cover scenarios for mid-century for a 238km long Kanpur stretch of Ganga river. Climate change projections from 21 General Circulation Models for the scenarios of RCP 4.5 and RCP 8.5 are considered and Land use Land Cover (LULC) projections are made with QGIS software. Streamflow and water temperature are modelled using the HEC-HMS model and a Water-Air temperature regression model, respectively. Water quality analysis is simulated using the QUAL2K model in terms of nine water quality parameters, dissolved oxygen, biochemical oxygen demand (BOD), ammonia nitrogen, nitrate nitrogen, total nitrogen, organic phosphorus, inorganic phosphorus, total phosphorus and faecal coliform. Climate change impact alone is projected to result in degraded water quality in the future. Combined climate change and LULC change may further degrade water quality, especially at the study area's critical locations. Our study will provide guidance to policymakers to safeguard the Ganga river from further pollution.</p>

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