Effect on Water Quality of Chaohu Lake with the Water Transfer Project from Yangtze River

Abstract Honghu Lake is the largest lake-type wetland in Hubei Province, China. It is also one of the largest shallow lakes in the Yangtze River Economic Zone, a key area in the relatively more developed southeast of China. However, the water quality has seen a deterioration tendency in recent decades, mostly owing to unreasonable human activities such as lake enclosure aquaculture following rapid social and economic development. Based on the water quality index (WQI) method, the water quality of Honghu Lake, by the vast amount of data collected from five observation sites monitored over ten years, was analyzed and evaluated. The results show that: (i) the water quality of Honghu Lake is in the ‘General’ grade as a whole with a WQI value of 43.41 ± 6.66; (ii) the water quality has been improving in the recent two years, reversing its decade-long deterioration; (iii) the water quality sampled at the Lantian site is the worst while that of the Guandun site is the best; (iv) the concentration of Pb and Cd are the key parameters to determine the water quality of Honghu Lake. Therefore, it can be concluded that more attention should be paid to investigate heavy metals in Honghu Lake in the future.

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Effect of water diversion from the Yangtze River to Chang Lake on hydrodynamic characteristics and water quality of Chang Lake

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/153/6/062060 ◽

2018 ◽

Vol 153 ◽

pp. 062060

Author(s):

Yan Li ◽

Hong Lin Guan ◽

Yan Wang

Keyword(s):

Water Quality ◽

Yangtze River ◽

Water Diversion ◽

Hydrodynamic Characteristics ◽

The Yangtze River ◽

Effect Of Water

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The Effects of Water Transfer from Swakoppoort and Omatako Dams on the Water Quality of Von Bach Dam, Namibia

SpringerBriefs in Environmental Science - Combating Water Scarcity in Southern Africa ◽

10.1007/978-94-007-7097-3_5 ◽

2013 ◽

pp. 79-118

Author(s):

J. J. Sirunda ◽

D. Mazvimavi

Keyword(s):

Water Quality ◽

Water Transfer

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Numerical Study on the Impact of the Sewage Drainage on Water Quality of Shanghai Water Sources

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.433-440.1020 ◽

2012 ◽

Vol 433-440 ◽

pp. 1020-1026 ◽

Cited By ~ 2

Author(s):

Jie Gu ◽

Wen Ting Li ◽

Jing Huang ◽

Bing Han

Keyword(s):

Water Quality ◽

Yangtze River ◽

Numerical Study ◽

Water Source ◽

The Yangtze River ◽

The South ◽

Tidal Period ◽

High Pollution ◽

The Impact

A 2D current and water quality model was set up with Delft3D-FLOW in this research, which was well calibrated and verified with the observed tidal levels and velocities. Considered with the project of the Qingcaosha Water Source, Pollution concentration distribution caused by sewage outfalls in the south bank of the Yangtze River during a neap tide of dry season is simulated and the computed results show: a high pollution zone appears near the south shore, and moves upward with flood flow and downward with ebb flow, however, it is bounded a limit region around the outfalls. During the tidal period, the water quality of the Qingcaosha water source can be classified as the second class water, which can ensure the normal water supply as the Shanghai water source. It is suggested that the regular monitoring water quality in this high pollution zone should be put into practice to ensure the water quality of water sourecs. The Yangtze River is adjacent to the East Sea and it’s the largest river in China, with obvious seasonal variant runoff and tidal flow. The Yangtze River was bifurcated by Chongming Island to south and north branch from Xuliujing, most of the flow go down through the south branch. The south branch was divided into south and north channel by Changxing Island and Hengsha Island. The south channel was bifurcated by Jiuduansha Shoal to south and north passage, three bifurcation areas and four estuarine outlets were formed (see Fig 1.)

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Spatiotemporal Characteristics of the Water Quality and Its Multiscale Relationship with Land Use in the Yangtze River Basin

Remote Sensing ◽

10.3390/rs13163309 ◽

2021 ◽

Vol 13 (16) ◽

pp. 3309

Author(s):

Jian Wu ◽

Sidong Zeng ◽

Linhan Yang ◽

Yuanxin Ren ◽

Jun Xia

Keyword(s):

Water Quality ◽

Land Use ◽

Temporal Variation ◽

Yangtze River ◽

Stream Water ◽

Yangtze River Basin ◽

The Yangtze River ◽

Stream Water Quality ◽

The Yangtze River Basin

The spatiotemporal characteristics of river water quality are the key indicators for ecosystem health evaluation in basins. Land use patterns, as one of the main driving forces of water quality change, affect stream water quality differently with the variations in the spatiotemporal scales. Thus, quantitative analysis of the relationship between different land cover types and river water quality contributes to a better understanding of the effects of land cover on water quality, the landscape planning of water quality protection, and integrated water resources management. Based on water quality data of 2006–2018 at 18 typical water quality stations in the Yangtze River basin, this study analyzed the spatial and temporal variation characteristics of water quality by using the single-factor water quality identification index through statistical analysis. Furthermore, the Spearman correlation analysis method was adopted to quantify the spatial-scale and temporal-scale effects of various land uses, including agricultural land (AL), forest land (FL), grassland (GL), water area (WA), and construction land (CL), on the stream water quality of dissolved oxygen (DO), chemical oxygen demand (CODMn), and ammonia (NH3-N). The results showed that (1) in terms of temporal variation, the water quality of the river has improved significantly and the tributaries have improved more than the main rivers; (2) in the spatial variation respect, the water quality pollutants in the tributaries are significantly higher than those in the main stream, and the concentration of pollutants increases with the decrease of the distance from the estuary; and (3) the correlation between DO and land use is low, while that between NH3-N, CODMn, and land use is high. CL and AL have a negative effect on water quality, while FL and GL have a purifying effect on water quality. In particular, AL and CL have a significant positive correlation with pollutants in water. Compared with NH3-N, CODMn has a higher correlation with land use at a larger scale. The results highlight the spatial scale and seasonal dependence of land use on water quality, which can provide a scientific basis for land management and seasonal pollution control.

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