scholarly journals The impact of the operation of Eastern Route Project of the South-to-North Water Diversion Project on water quality in Lake Nansi

2012 ◽  
Vol 24 (6) ◽  
pp. 923-931 ◽  
Author(s):  
ZHAO Shixin ◽  
◽  
ZHANG Chen ◽  
GAO Xueping ◽  
LI Wenmeng
Keyword(s):  
Water Quality ◽  
Water Diversion ◽  
The South ◽  
Water Diversion Project ◽  
North Water ◽  
The Impact

scholarly journals Assessment and Management of Pressure on Water Quality Protection along the Middle Route of the South-to-North Water Diversion Project

2019 ◽  
Vol 11 (11) ◽  
pp. 3087 ◽  
Author(s):  
Baolong Han ◽  
Nan Meng ◽  
Jiatian Zhang ◽  
Wenbo Cai ◽  
Tong Wu ◽  
...  
Keyword(s):  
Water Quality ◽  
Land Use Changes ◽  
Water Diversion ◽  
Water Protection ◽  
The South ◽  
Water Quality Protection ◽  
Functional Zoning ◽  
Water Diversion Project ◽  
North Water ◽  
Global Concern

Water scarcity in densely populated areas is a global concern. In China, ensuring water supply and quality in the middle of the South-to-North Water Diversion Project has become a major challenge due to the complexity and diversity of landscape features and the trunk canal construction in the crossing area of this route. Precise assessments of the pressures on water protection along the route are urgently needed. This article provides a rigorous methodological framework to assess water quality protection, identifying the intensity of human disturbance along the route within 2-km radius buffer areas on both sides of the trunk canal, based on land-use changes from 2005 to 2015. The results show that more than 10,000 ha of pervious surfaces were transformed into impervious surfaces, leading to undesirable outcomes. The results of this study can be used for decisive support in China’s environmental management, such as with main functional zoning policy and ecological red lines policy.

scholarly journals A study on the phytoplankton community structure in the Diaohe River section of the Middle Route of the South-to-North Water Diversion Project in winter

2020 ◽  
Author(s):  
Yi Xu ◽  
Jiankui Liang ◽  
Junqiang Lin ◽  
Xiaohui Lei ◽  
Gongbo Ding ◽  
...  
Keyword(s):  
Water Quality ◽  
Phytoplankton Community ◽  
Water Diversion ◽  
Future Research ◽  
River Section ◽  
The South ◽  
Water Diversion Project ◽  
North Water ◽  
Quality Indexes

Abstract As the first span and aqueduct of the Middle Route of the South-to-North Water Diversion Project, Diaohe Aqueduct has brought good engineering and social benefits since its completion. In order to understand the present water quality of the Diaohe River section of the route, four samplings were conducted at Diaohe Aqueduct in the winter of 2018. The main results of this study are as follows: 62 species (or variants) of phytoplankton belonging to 32 genera, 22 families and six phyla were identified during the study period, among which Bacillariophyta are the most dominant species. The identified phytoplankton fall into eight indicator grades: os; ps, αm; ps, αm, βm; αm; αm, βm; αm, βm, os; βm; and βm, os. A total of 17 functional groups are detected, among which TB is the absolute dominant functional group. Based on the composition characteristics of phytoplankton, the water quality trophic state of Diaohe Aqueduct is mesotrophic. However, other physical indexes show that the water quality of the Middle Route of the South-to-North Water Diversion Project is good. The conclusions drawn using phytoplankton alone as the evaluation index may not be comprehensive. In future research, how to build a comprehensive index system combining other water quality indexes for the Middle Route of the South-to-North Water Diversion Project needs yet to be improved and tested.

Emergency Control Strategy for Unexpected Water Pollution Accidents in the Middle Route Open Channel of the South-to-North Water Diversion Project

2014 ◽  
Vol 1030-1032 ◽  
pp. 519-525
Author(s):  
Tong Lai Xue ◽  
Hui Ming Wu ◽  
Wei Hong Liao ◽  
Xiao Hui Lei ◽  
Hao Xu
Keyword(s):  
Water Pollution ◽  
Water Quality ◽  
Control Strategy ◽  
Control Strategies ◽  
Water Diversion ◽  
Level Fluctuation ◽  
The South ◽  
Emergency Control ◽  
Water Diversion Project ◽  
North Water

This paper takes a typical channel passage in the middle route of the South-to-North water diversion project as an example to study emergency control strategies for unexpected water pollution accidents. A one-dimensional Saint Venant equation and water quality numerical model is developed, considering limitations such as the migration velocity of pollutants, water level fluctuation, and variations in the channel. Emergency control strategies for each gate are proposed for unexpected water pollution accidents and gate closing rules are established. Parameters such as the channel water depletion rate, stabilization time, water level fluctuation, and water quality are simulated under different control strategies in order to ensure the safe operation of water transport and to decide on the control strategy for unexpected water pollution accidents. Such studies can provide reference information for the development of emergency strategies in the middle route of the South-to-North water diversion project.

scholarly journals Driving factors for runoff decline in the Upper Hanjiang basin, a major water source for the South-to-North Water Diversion Project in China

2015 ◽  
Vol 368 ◽  
pp. 63-68
Author(s):  
S. Zhang ◽  
D. Yang ◽  
X. Xu
Keyword(s):  
Landscape Change ◽  
Water Source ◽  
Qualitative Description ◽  
Water Diversion ◽  
The South ◽  
Runoff Change ◽  
Water Diversion Project ◽  
North Water ◽  
Runoff Decrease ◽  
The Impact

Abstract. With dramatic changes in climate and land-cover patterns around the world, it is of great significance to evaluate the corresponding influence on runoff change as water resources have become a strategic resource. We analysed the runoff change driven by landscape change and climate variation in Hanjiang River basin, which is the water source area of the central route of the South-to-North Water Diversion Project in China. Results show that the runoff decreased greatly from 1960 to 2012 in all the six selected sub-catchments. Attribution analysis results show that reduction of precipitation contributed to the catchment runoff decrease by 39.5–64.9% and landscape change, represented by increase of the parameter in the mathematical Budyko function contributed to the runoff decrease by 34.4–63.3%, while potential evapotranspiration change had a slightly negative contribution. In addition, the contribution is spatially variable from downstream to upstream. We conclude with a qualitative description about how water availability changes under changing landscape and climate conditions, and focus on the impact of vegetation cover change.

scholarly journals Spatio-temporal Characterization Analysis and Water Quality Assessment of the South-to-North Water Diversion Project of China

2019 ◽  
Vol 16 (12) ◽  
pp. 2227 ◽  
Author(s):  
Nong ◽  
Shao ◽  
Xiao ◽  
Zhong
Keyword(s):  
Water Quality ◽  
Correlation Analysis ◽  
Human Activities ◽  
Water Diversion ◽  
Data Matrix ◽  
The South ◽  
Potential Threat ◽  
Water Diversion Project ◽  
North Water ◽  
Spatio Temporal

In this article, a data matrix of 20 indicators (6960 observations) was obtained from 29 water quality monitoring stations of the Middle Route (MR) of the South-to-North Water Diversion Project of China (SNWDPC). Multivariate statistical techniques including analysis of variance (ANOVA), correlation analysis (CA), and principal component analysis (PCA) were applied to understand and identify the interrelationships between the different indicators and the most contributive sources of anthropogenic and natural impacts on water quality. The water quality index (WQI) was used to assess the classification and variation of water quality. The distributions of the indicators revealed that six heavy-metal indicators including arsenic (As), mercury (Hg), cadmium (Cd), chromium (Cr), selenium (Se), and lead (Pb) were within the Class I standard, while the As, Pb, and Cd displayed spatial variation. Moreover, some physicochemical indicators such as dissolved oxygen, 5-day biochemical oxygen demand (as BOD5), and total phosphorus (TP) had spatio-temporal variability. The correlation analysis result demonstrated that As, Hg, Cd, Cr, Se, Pb, copper (Cu), and zinc (Zn) had high correlation coefficients. The PCA result extracted three principal components (PC) accounting for 82.67% of the total variance, while the first PC was indicative of the mixed sources of anthropogenic and natural contributions, the second and the third PCs were mainly controlled by human activities and natural sources, respectively. The calculation results of the WQI showed an excellent water quality of the MR of the SNWDPC where the values of the stations ranged from 10.49 to 17.93, while Hg was the key indicator to determine the WQI > 20 of six stations, which indicated that the Hg can be the main potential threat to water quality and human health in this project. The result suggests that special attention should be paid to the monitoring of Hg, and the investigation and supervision within the areas of high-density human activities in this project should be taken to control the impacts of urban and industrial production and risk sources on water quality.

Sign in / Sign up

Export Citation Format

Share Document