Preliminary study on relationship between urban built-up land and water quality in the Jiulong River Basin

2011 ◽  
Author(s):  
Yuan Feng ◽  
Jinliang Huang ◽  
Qinqin Sun ◽  
Qingsheng Li
Keyword(s):  
Water Quality ◽  
River Basin ◽  
Jiulong River ◽  
Preliminary Study

scholarly journals Nonpoint Pollution Source-Sink Landscape Pattern Change Analysis in a Coastal River Basin in Southeast China

2018 ◽  
Vol 15 (10) ◽  
pp. 2115 ◽  
Author(s):  
Xin Zhang ◽  
Qiong Zheng ◽  
Lin Zhou ◽  
Jiawei Wei
Keyword(s):  
Water Quality ◽  
River Basin ◽  
Landscape Pattern ◽  
Cultivated Land ◽  
Landsat Images ◽  
Residential Land ◽  
Jiulong River ◽  
Pattern Change ◽  
Unused Land ◽  
Source Sink

Analyzing the spatiotemporal characteristics of source-sink landscape pattern change in river basins is crucial for managing and controlling nonpoint source pollution. This study investigated the landscape pattern changes in Jiulong River basin from 1990 to 2015. A random forest classifier combined with texture and spectral information was applied to interpret the multi-temporal Landsat images. Landscape metrics were calculated to quantify the landscape at the patch level. Transition matrixes were derived for analyzing the conversion among different landscape types. It is notable that the largest values of the number of patches and patch density of residential land appeared in 2005, indicating the highest degree of fragmentation over this time period. The percentage of landscape for forestland was always higher than 71%, and the percentage of residential land increased from 7.42% to 14.55% during the last three decades, while unused land decreased from 5.3% to 2.8%. The downward trend of DO and the upward trend of NH3-N and TP indicate the deterioration of water quality during 2005–2015. The quantitative monitoring data of water quality indicators in Hua’an and Xiamen sites in Jiulong River basin are shown. The percentage of landscape of cultivated land increased during 2005–2010, which was consistent with the change tendency of NH3-N. Transition matrixes showed that the main changes occurred when forestland and unused land were transformed to residential land and cultivated land over the last three decades. Analysis results demonstrated a higher extent of landscape fragmentation and an unsustainable transition among source-sink landscapes.

scholarly journals A Preliminary Study of Water Quality Index in Terengganu River Basin, Malaysia

2015 ◽  
Vol 44 (1) ◽  
pp. 67-73 ◽  
Author(s):  
M. I. Mohd Sailan ◽  
Y. Y. Hee ◽  
E. A. Bedurus ◽  
M. T. Latif
Keyword(s):  
Water Quality ◽  
River Basin ◽  
Water Quality Index ◽  
Quality Index ◽  
Preliminary Study

Characteristics of Water Quality in Tributaries of the Sumjin River Basin

2017 ◽  
Vol 18 (6) ◽  
pp. 563-570
Author(s):  
Se Chang Son ◽  
Dae Hoon Kim ◽  
Jae Chun Lee ◽  
Jae Young Jae Young ◽  
Ki Wan Lee ◽  
...  
Keyword(s):  
Water Quality ◽  
River Basin

Water Quality Characteristics for Agricultural Reservoirs in Yeongsan River Basin

2020 ◽  
Vol 21 (1) ◽  
pp. 15-23
Author(s):  
Sang-Guen Oh ◽  
Jae-Young Lee ◽  
Jae-Woon Jung ◽  
Ju-Tae Song ◽  
Sang-Yun You ◽  
...  
Keyword(s):  
Water Quality ◽  
River Basin ◽  
Quality Characteristics

Water Quality in the Yakima River Basin, Washington, 1999-2000

Circular ◽  
2004 ◽  
Author(s):  
Gregory J. Fuhrer ◽  
Jennifer L. Morace ◽  
Henry M. Johnson ◽  
Joseph F. Rinella ◽  
James C. Ebbert ◽  
...  
Keyword(s):  
Water Quality ◽  
River Basin ◽  
Yakima River
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