Factors influencing water quality indices in a typical urban river originated with reclaimed water

Zhang, Jiao; Wei, Zhen; Jia, Haifeng; Huang, Xia

doi:10.1007/s11783-017-0943-5

Cited by 23 publications

(6 citation statements)

References 20 publications

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“…At present, landscape waters play an indispensable role in regulating the urban microclimate, improving the living environment and enhancing urban water storage and drainage functions [1]. However, the concentrations of nitrogen (N) and phosphorus (P) in landscape waters are intensified gradually with the development of the economy, which aggravates the risk of water blooms [2][3][4]. Although reducing nutrients is an effective way to control algal reproduction, it is difficult to reduce N and P to the level that algae have low growth potential due to technical considerations [5,6].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Combined Submerged Macrophyte Planting Conditions for Inhibiting Algae by Response Surface Methodology

Wang

Guo

et al. 2020

Water

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Combined planting of submerged macrophytes could be an effective way of controlling algal blooms in landscape waters. In this study, the algal inhibition of single and combined planting of Hydrilla verticillata (A) and Myriophyllum spicatum (B) were explored. The optimized combined planting conditions were investigated using the central composite design. The results showed that the combined planting had a synergistic algal-inhibiting effect. Its inhibition (I (K)) is about 10.8% higher than that of single planting with the same density. The synergism of the combined planting may be due to the different ways in which the two plants inhibit the algal growth. H. verticillata inhibited the algal biomass and M. spicatum inhibited the algal specific growth rate. When the density of H. verticillata and M. spicatum were 7.2 g/L and 6.7 g/L, the value of I (K) reached a maximum 92.2%. Although increasing planting density would improve the algal inhibition, high planting density was not beneficial for the growth of plants. Moreover, no further significant improvement was shown with the increasing planting density when the value of I(K) was higher than 90%. Therefore, the cost-effective combined macrophyte density was 11.6 g/L and the value of A/B ranged from 1.05 to 1.07, where the value of I (K) could achieve 90%. This study can provide a practical basis for using macrophytes to control algal blooms.

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Section: Introductionmentioning

confidence: 99%

Optimization of Combined Submerged Macrophyte Planting Conditions for Inhibiting Algae by Response Surface Methodology

Wang

Guo

et al. 2020

Water

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“…Water management is an important issue in public policy, and many efforts have been made to ensure security of water supply [1,2,3,4,5]. Numerical models have been proved to be effective tools that can characterize waterway risks at different temporal–spatial scales and may provide better information for water management [6,7].…”

Section: Introductionmentioning

confidence: 99%

A Coupled Modeling Approach for Water Management in a River–Reservoir System

Zhang

Huang

Zhou

et al. 2019

IJERPH

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A coupled model is an effective tool to understand the nutrient fate associated with hydrodynamic and ecosystem processes and thereby developing a water resource management strategy. This paper presents a coupled modeling approach that consists of a watershed model and a hydrodynamic model to evaluate the nutrient fate in a river–reservoir system. The results obtained from the model showed a good agreement with field observations. The results revealed that the Shuikou reservoir (Fuzhou, China)exhibited complicated hydrodynamic characteristics, which may induce the pattern of nutrient export. Reservoirs can greatly lower water quality as a result of decreasing water movement. Three scenarios were analyzed for water management. The NH3-N (Ammonia Nitrogen) decreased sharply in the outlet of Shuikou reservoir after NH3-N level in its tributary was reduced. After removing the farming cages, the water quality of the outlet of Shuikou reservoir was improved significantly. The DO (Dissolved Oxygen) had increased by 3%–10%, NH3-N had reduced by 5%–17%, and TP (Total Phosphorus) had reduced by 6%–21%. This study demonstrates that the proposed coupled modeling approach can effectively characterize waterway risks for water management in such a river–reservoir system.

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“…In areas with poor sanitation or lack of wastewater treatment facilities, these runoffs are highly polluted and when they make their way into the rivers, they also serve as a major pollutant in the river. Research has shown that urban effluent into water bodies have the ability to change the physical and chemical conditions of a river, thereby leading to a contaminated state [3]. Hardoy, et al 2001 indicated that river pollution from city-based industries and untreated sewage can lead to serious health problems in settlements downstream.…”

Section: Introductionmentioning

confidence: 99%

Effect of Urban Effluent on River Water Quality in the Niger Delta

Ihunwo¹

2018

FEM

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Urban effluent polluted with sewage is a major source of pollution in developing countries, yet it is a line of study that is not properly explored. In this research, a river under influence from urban effluent was studied for four months, i.e. two seasons (dry season: February and March, wet season: April and May. Four sites along the river were identified for weekly sampling, with a distance from the start of the river as follows; site 1-100m, site 2-300m, site 3-500m and site 4-1000m. In situ measurements of salinity were collected weekly. Samples were analysed for Dissolved Oxygen, Biochemical Oxygen Demand, phosphate and nitrate. Total Heterotrophic Bacteria (THB), Total Coliform Bacteria (TCB) and Faecal Coliform Bacteria (FCB) were also measured in water samples collected. These parameters were selected to access the activities of the microbial community in the water because of wastewater from the surrounding urban settlement on the watershed temporally and spatially. Results showed that the parameters studied changed in season and along the river. The dry season had significantly higher concentrations of parameters studied when compared to the wet seasons. Results also confirmed that the study river is polluted due to the urban effluent. This confirmation was attributed to the values of THB, TCB and FCB which were substantially high and varied from dry to wet season in the river.

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Factors influencing water quality indices in a typical urban river originated with reclaimed water

Cited by 23 publications

References 20 publications

Optimization of Combined Submerged Macrophyte Planting Conditions for Inhibiting Algae by Response Surface Methodology

Optimization of Combined Submerged Macrophyte Planting Conditions for Inhibiting Algae by Response Surface Methodology

A Coupled Modeling Approach for Water Management in a River–Reservoir System

Effect of Urban Effluent on River Water Quality in the Niger Delta

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