scholarly journals Water quality assessment of middle route of South-North water diversion project based on modified Nemerow index method

2021 ◽  
Author(s):  
Yilin Yang ◽  
Dawei Zhang ◽  
Jin Quan ◽  
Pengwen Wang ◽  
Yi Xu
Keyword(s):  
Water Quality ◽  
Quality Indicators ◽  
Early Stage ◽  
Water Quality Assessment ◽  
Water Diversion ◽  
Index Method ◽  
Water Quality Indicators ◽  
Water Diversion Project ◽  
North Water

Abstract It is of great significance to find a scientific way to assess the water quality of the middle route of the South-North Water Diversion Project. In this paper, the spatio-temporal changes of the 26 water quality indicators in eight key monitoring stations along the middle route since the project was put into use were analyzed, and the modified Nemerow index method was employed to assess the water quality of the route in its early stage of operation. The results show that the water quality remained good in the period of study. Important water quality indicators were identified, including temperature, permanganate index, dissolved oxygen, total phosphorus, total nitrogen, mercury content, and density of planktonic algae. It is advised that potential ecological risks related to algae and shellfish reproduction in the open canal deserve special attention.

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.

scholarly journals Utilization of factor analysis in waterworks engineering

2004 ◽  
Vol 52 (2) ◽  
pp. 121-128
Author(s):  
Petra Nováková
Keyword(s):  
Water Quality ◽  
Factor Analysis ◽  
Quality Indicators ◽  
Water Reservoir ◽  
Statistical Processing ◽  
Point Of View ◽  
Water Quality Indicators ◽  
Quality Of Water ◽  
The Individual

The aim of the work was to elaborate and evaluate the water quality of water reservoir Vranov nad Dyjí. Fresh water was sampled in five different locations of the reservoir (three important tributaries, dam and water captation locality). Ten, the most essential water quality indicators were selected. From the point of view of water quality indicators complexity the most integrated samples were taken in the water captation locality (period 1984 – 2002). At other locations, there were missing dates from the eightieth, but their volume was sufficient for statistical processing.Correlation analyses for the individual locations and dimensions were done as so as determination coefficients for all localities during the time period of 1994 – 2002. The results demonstrate very good allocation of the water captation from the point of view of the water flow.Multiples and factor analysis was done for the period of 1984 – 2002 in the locality Jelení zátoka where the object of water captation is situated. The results of the analysis are nine factors, which influence the water quality of the reservoir. From the point of view of the importance three factors were interpreted.The analyses and results are part of my Ph.D. thesis. The results will be used for other evaluations of the water quality in the reservoir and tributaries, for activities in the catchment’s area and for proposal processing other zones of second level of protected areas.

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.

Algae control in oligotrophic surface water under the joint effect of nutritional competition and microbial algae-lytic substance

2022 ◽  
Author(s):  
Xi-Yan Gao ◽  
Wei Xie ◽  
Zhi-Pei Liu
Keyword(s):  
Surface Water ◽  
Joint Effect ◽  
Water Diversion ◽  
Source Water ◽  
Water Diversion Project ◽  
North Water ◽  
Algae Control

Harmful algal abnormal proliferation presents the most severe threat to the quality of oligotrophic surface water even in source water such as South-to-North Water Diversion Project in China. A novel...

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