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System Dynamics Modeling for sustainable water management of a Coastal Area in Shandong Province, China

Journal of Earth Science and Engineering 2016年第4期6卷 226-234页

作者： Qin Huanhuan Zhang Baoxiang Meng Fanhai Institute of water Sciences and College of Engineering Peking University Beijing 100871 China water Resources Research Institute of Shandong Province Jinan 250013 Shandong China water Bureau of Longkou City Longkou 265701 Shandong China

water is one of the basic materials in human existence and the development of society and economy. Its sustainable management has always been an eternal subject for the management of human society and also a complex systemic problem. How to take advantages of water has been a big event in such an agricultural country like China. As economically developed areas, coastal areas are facing water shortage problems due to the rapid economic and social development and inappropriate and unsustainable water management measures. To fully understand and study such problems faced by the coastal areas needs a systematic and integrated framework to consider the various social-economic, natural and engineering factors that affect the sustainable development of water in those areas. The SD （system dynamics） methodology, which is an approach that has been successfully used in solving complex systematic problems in general, and in solving water management problems in particular for more than 50 years, was applied to a typical coastal area, Longkou City in Shandong Province of China, to study and analyze the future sustainable water management of this city. Then the quantitative modeling and analysis of the water development were carried out through scenario analysis. Four different scenarios （business as usual, economic development, water resources protection, and comprehensive） were designed by changing the values of decision-making variables. The total water demand in 2030 of these four scenarios are 0.455 billion m3, 0.793 billion m3, 0.412 billion m3 and 0.487 billion m3, respectively; the corresponding water deficit of these scenarios are 0.292 billion m3, 0.634 billion m3, 0.254 billion m3 and 0.329 billion m3, respectively. The comparison results indicated that the comprehensive scenario is the optimal one among these designed scenarios. To totally solve the water shortage problem with the economy developed in Longkou City needs to take more effective measures to reduce water

关键词： sustainable water management coastal areas system dynamics scenario analysis

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Gray water Measurement and Feasibility of Retrieval Using Innovative Technology and Application in water Resources management in Isfahan-Iran

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Journal of Geographical Research 2020年第2期3卷 11-19页

作者： Safieh Javadinejad Rebwar Dara Forough Jafary Isfahan University of Technology Isfahan ProvinceKhomeyni ShahrDaneshgah e Sanati HwyIran University of Salahaddin ErbilIraq University of Birmingham Edgbaston St.B152TTUK

Reuse of wastewater for agriculture and green spaces purposes is significant.A mean yearly precipitation in Esfahan is 150 *** drinking water and agriculture usually used underground resources in the *** water recycling is known as a suitable option *** all the water requirements of a home from refined water rises the cost of *** the essential water quality for garden,toilet and irrigation is less than drinking ***,the aim of this study is to analyze the evaluation of gray water and estimate the amount of recycle gray water which can use for drinking water with innovation method in Esfahan region in *** studies did not measure the value of recycling gray water with new method of waste water treatment that can use for drinking *** this study,gray water in Esfahan city is measured and technical aspects of its recycling is *** of the lack of referable guidelines and official technical reports,studies from other similar countries applied in this study and on the basis of which the amount of recoverable gray water was *** indicates that the overall recovery of gray water in Esfahan saves nine million cubic meters of *** price of the rial of this value established on water is 190 billion *** the lack of water sources in Esfahan,the recycle of gray water seems to be a good option,however more research is required to select a recovery strategy.

关键词： Gray water sustainable water management New technology Reuse of gray water

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Performance of a Horizontal Flow Constructed Reed Bed Filter for Municipal Wastewater Treatment: The Case Study of the Prototype Installed at Gaston Berger University, Saint-Louis, Senegal

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Natural Resources 2024年第1期15卷 1-16页

作者： Abdou Khafor Ndiaye Falilou Coundoul Abdoulaye Deme Antonina Torrens Armengol Abdoulaye Senghor UFR of Applied Sciences and Technology Gaston Berger University of Senegal Saint-Louis Senegal Polytechnic Institute of Saint-Louis (IPSL) Gaston Berger University of Saint-Louis Saint-Louis Senegal Department of Biology Healthcare and Environment Faculty of Pharmacy and Food Sciences University of Barcelona Barcelona Spain Sanitation Department Ministry in Charge of Sanitation Dakar Senegal

In Saint-Louis, Senegal, a constructed wetland with horizontal flow reed beds (FHa and FHb) has demonstrated significant efficacy in treating municipal wastewater. Analyzing various treatment stages, the system showed only a slight temperature variation, from an influent average of 26.3°C to an effluent of 24.7°C. Electrical conductivity decreased from 1331 mS/cm to 974.5 mS/cm post-primary treatment, with suspended solids (SS) dramatically reduced from 718.9 mg/L to 5.7 mg/L in the final effluent. Biochemical oxygen demand (BOD5) and chemical oxygen demand (COD) saw a notable decrease, from initial levels of 655.6 mg/L and 1240 mg/L to 2.3 mg/L and 71.3 mg/L, respectively. Nitrogenous compounds (N-TN) and phosphates () also decreased significantly, indicating the system’s nutrient removal capacity. Microbiological analysis revealed a reduction in fecal coliforms from 7.5 Ulog/100ml to 1.8 Ulog/100ml and a complete elimination of helminth eggs. The presence of Phragmites and Typha was instrumental in enhancing these reductions. The system’s compliance with the Senegalese standards for disposal into natural environments, WHO recommendations for unrestricted water reuse in irrigation, and the European legislation for water reuse was established. The effluent quality met the stringent criteria for various classes of agricultural reuse, illustrating the system’s potential for sustainable water management. This wetland model presents a robust solution for water-stressed regions, ensuring environmental protection while supporting agricultural needs. The study calls for ongoing research to further refine the system for optimal, reliable wastewater treatment and water resource sustainability.

关键词： Constructed Wetlands Horizontal Flow Reed Beds Wastewater Treatment Phragmites and Typha Plants Physicochemical Pollutant Removal Microbiological Indicators Fecal Coliforms and Helminth Eggs water Quality Improvement Senegal water Reuse Standards sustainable water management Agricultural Irrigation Reuse Nutrient Removal Efficiency Environmental Engineering Ecological Sanitation Systems

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