River Water Quality Improvement and Economics of Soft Interventions in the Yamato-Gawa River Basin

2012 ◽  
Author(s):  
Yoshiaki Tsuzuki ◽  
Minoru Yoneda
Keyword(s):  
Water Quality ◽  
Quality Improvement ◽  
River Water ◽  
River Basin ◽  
River Water Quality ◽  
Water Quality Improvement

Cost-effective solutions for river water quality improvement in Eindhoven supported by sewer-WWTP-river integrated modeling

2012 ◽  
Vol 2012 (13) ◽  
pp. 3337-3342
Author(s):  
L. Benedetti ◽  
J. Langeveld ◽  
J.J.M. de Klein ◽  
I. Nopens ◽  
A. van Nieuwenhuijzen ◽  
...  
Keyword(s):  
Water Quality ◽  
Quality Improvement ◽  
River Water ◽  
Cost Effective ◽  
River Water Quality ◽  
Integrated Modeling ◽  
Water Quality Improvement

Using a constructed wetland for non-point source pollution control and river water quality purification: a case study in Taiwan

2010 ◽  
Vol 61 (10) ◽  
pp. 2549-2555 ◽  
Author(s):  
C. Y. Wu ◽  
C. M. Kao ◽  
C. E. Lin ◽  
C. W. Chen ◽  
Y. C. Lai
Keyword(s):  
Water Quality ◽  
Wastewater Treatment ◽  
Quality Improvement ◽  
Point Source ◽  
River Water ◽  
Constructed Wetlands ◽  
Constructed Wetland ◽  
River Water Quality ◽  
Water Quality Improvement ◽  
Wetland System

The Kaoping River Rail Bridge Constructed Wetland, which was commissioned in 2004, is one of the largest constructed wetlands in Taiwan. This multi-function wetland has been designed for the purposes of non-point source (NPS) pollutant removal, wastewater treatment, wildlife habitat, recreation, and education. The major influents of this wetland came from the local drainage trench containing domestic, agricultural, and industrial wastewaters, and effluents from the wastewater treatment plant of a paper mill. Based on the quarterly investigation results from 2007 to 2009, more than 96% of total coliforms (TC), 48% of biochemical oxygen demand (BOD), and 40% of nutrients (e.g. total nitrogen, total phosphorus) were removed via the constructed wetland system. Thus, the wetland system has a significant effect on water quality improvement and is capable of removing most of the pollutants from the local drainage system before they are discharged into the downgradient water body. Other accomplishments of this constructed wetland system include the following: providing more green areas along the riversides, offering more water assessable eco-ponds and eco-gardens for the public, and rehabilitating the natural ecosystem. The Kaoping River Rail Bridge Constructed Wetland has become one of the most successful multi-function constructed wetlands in Taiwan. The experience obtained from this study will be helpful in designing similar natural treatment systems for river water quality improvement and wastewater treatment.

scholarly journals Financial Analysis for Improving River Water Quality through Introduction of Organic Agriculture

2021 ◽  
Vol 13 (5) ◽  
pp. 2960
Author(s):  
Xiaoling Zhu ◽  
Hio-Jung Shin
Keyword(s):  
Water Quality ◽  
Quality Improvement ◽  
River Water ◽  
Organic Agriculture ◽  
Financial Analysis ◽  
Policy Instrument ◽  
River Water Quality ◽  
Water Quality Improvement ◽  
Study Results

With scientific awareness of the main source of water pollution from conventional agriculture along the Dagu River Basin, Qingdao, China, this study aims to identify economic efficiency in introducing an environmentally friendly agricultural policy instrument. For more exact financial analysis, considered were benefits obtained by residents and farmers from water quality improvement and conversion cost from conventional to organic agriculture. A bivariate probit model was used to estimate the mean willingness to pay (WTP) for improving the water quality of the river and determinants affecting residents’ WTP were identified. Empirical results show that mean WTPs are CNY 5.71 (USD 0.83) and CNY 26.47 (USD 3.84) per month per household, respectively. The opportunity cost of volunteering activity hours is CNY 222.77 (USD 32.39) per month per household. Application to the residents of Qingdao would obtain aggregate total benefits from improving the river water quality of CNY 7.54 billion (USD 1.09 billion)- CNY 8.23 billion (USD 1.19 billion) per year. Farmers’ profit obtained by value transfer and price index adjustment is CNY 46.61 billion (USD 6.75 billion) from organic agriculture, which is more profitable. After the implementation of organic agriculture policy, therefore, the total benefits of farmers and residents are much higher than the total cost of conversion to organic agriculture. The study results could provide a preponderant economic indicator to policy decision makers for water quality improvement projects.

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