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Optimized operation plan for sewer sediment control

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2010年第5期11卷 335-341页

作者： Yong-chao ZHOU Tian LI Institute of Municipal Engineering Zhejiang University Hangzhou 310058 China College of Environmental Science and Engineering Tongji University Shanghai 200096 China

Severe operational problems of sediment deposition have frequently occurred in stormwater sewer systems in Shanghai city due to the flat topography of the area and serious illicit connections. To control sewer sediment and its subsequential problems,optimized operation plans were proposed and an innovative performance assessment method was developed. Simula-tion results demonstrated that,through changing the way of pump operation and installing necessary actuators in the system,the optimized operations,especially batch intermittent intercept plan,effectively improved the flow velocity in the entire system in dry-weather condition. In conclusion,the optimized operation is an innovative idea for improving the performance and solving the problem of sediment deposition in the sewer system in Shanghai,China.

关键词： Sewer system sediment control Performance assessment Simulation

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Forestry Interventions and Groundwater Recharge, sediment control and Carbon Sequestration in the Krishna River Basin

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Open Journal of Forestry 2023年第4期13卷 368-395页

作者： Humachadakatte Ramachandra swamy Prabuddha Madan Prasad Singh Prathima Purushotham Baragur Neelappa Divakara Tattekere Nanjappa Manohara Basavarajaiah Shivamma Chandrashekar Namasivayam Ravi Nimmala Mohan Reddy Ombir Singh Institute of Wood Science and Technology Bengaluru India AgriCapita Innotech Private Limited Bhopal India Forest Research Institute Dehradun India

It is a known fact that human activities have a significant impact on global rivers, making the task of rehabilitating them to their former natural state or a more semi-natural state quite challenging. The ongoing initiative called “Rejuvenation of Krishna River through Forestry Interventions” aims to contribute to the overall river rejuvenation program in the country. In this context, the effects of forestry interventions on the Krishna River will be evaluated based on water quantity, water quality, and the potential for carbon sequestration through plantation efforts. To assess the outcomes of this study, various methodologies such as Soil Conservation Service Curve Number (SCS-CN), Central Ground Water Board (CGWB) and Intergovernmental Panel on Climate Change (IPCC) have been utilized to estimate water savings, reduction in sedimentation, and carbon sequestration potential within the Krishna basin. The projected results indicate that the implementation of forestry plantations and soil and moisture conservation measures in the Krishna River rejuvenation program could lead to significant improvements. Specifically, the interventions are expected to enhance water recharge by 400.49 million cubic meters per year, reduce sedimentation load by 869.22 cubic meters per year, and increase carbon sequestration by 3.91 lakh metric tonnes per year or 14.34 lakh metric tonnes of CO2 equivalent. By incorporating forestry interventions into the Krishna riverscape, it is anticipated that the quality and quantity of water flowing through the river will be positively impacted. These interventions will enhance water infiltration, mitigate soil erosion, and contribute to an improved vegetation cover, thereby conserving biodiversity. Moreover, they offer additional intangible benefits such as addressing climate change concerns through enhanced carbon sequestration potential along the entire stretch of riverine areas.

关键词： Forestry Interventions Krishna River Basin sediment control Water Recharge Carbon Sequestration

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Impact of Forestry Interventions on Groundwater Recharge and sediment control in the Ganga River Basin

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Open Journal of Forestry 2023年第1期13卷 13-31页

作者： Ombir Singh Saswat Kumar Kar Nimmala Mohan Reddy Forest Research Institute Dehradun India ICAR-Indian Institute of Soil & Water Conservation Dehradun India AgriCapita Innotech Private Limited Bhopal India

Water related services of natural infrastructure will help to combat the risk of water crisis, and nature-based solutions involve the management of ecosystems to mimic or optimize the natural processes for the provision and regulation of water. Forested areas provide environmental stability and supply a high proportion of the world’s accessible freshwater for domestic, agricultural, industrial and ecological needs. The present work on “Forestry Interventions for Ganga” to rejuvenate the river is one of the steps toward the Ganga River rejuvenation programme in the country. The consequences of forestry interventions for Ganga will be determined on the basis of water quantity and water quality in the Ganga River. The study conservatively estimated the water savings and sedimentation reduction of the riverscape management in the Ganga basin using the Soil Conservation Service Curve Number (SCS-CN) & GEC, 2015 and Trimble, 1999 & CWC, 2019 methodologies, respectively. Forestry plantations and soil and moisture conservation measures devised in the programme to rejuvenate the Ganga River are expected to increase water recharge and decrease sedimentation load by 231.011 MCM·yr-1 and 1119.6 cubic m·yr-1 or 395.20 tons·yr-1, respectively, in delineated riverscape area of 83,946 km2 in Ganga basin due to these interventions. The role of trees and forests in improving hydrologic cycles, soil infiltration and ground water recharge in Ganga basin seems to be the reason for this change. Forest plantations and other bioengineering techniques can help to keep rivers perennial, increase precipitation, prevent soil erosion and mitigate floods, drought & climate change. The bioengineering techniques could be a feasible tool to enhance rivers’ self-purification as well as to make river perennial. The results will give momentum to the National Mission of Clean Ganga (NMCG) and its Namami Gange programme including other important

关键词： Bioengineering Measures Ganga River Basin sediment control Water Harvesting

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RISK MANAGEMENT IN ENVIRONMENTAL COMPLIANCE:WHAT HAPPENS WHEN YOUR OPERATION IS BEING CONSTRUCTED?

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Journal of Green Building 2014年第3期9卷 37-49页

作者： Jennifer Hildebrand Environmental Compliance WSB and AssociatesInc

Nearly forty years after the Clean Water Act(CWA)was passed,we’ve come a long way in our understanding of the strength and fragility of our water resources and the impact that our actions or inactions can have on *** regulatory systems are in place and best management practices(BMPs)are plentiful,successfully managing risk in environmental compliance remains a constant ***,the rules to environmental compliance are simple:half of it is paperwork and the other half is *** you take an organized and balanced approach to compliance,you should be able to keep risk at bay and avoid enforcement ***,remember that no matter how thoroughly you prepare for a construction project,you may still encounter unexpected situations requiring environmental knowledge and *** you start to plan your operation,you should take the time to stop and consider the risk associated with your *** Environmental Protection Agency(EPA)considers risk to be“the chance of harmful effects to human health or to ecological systems resulting from exposure to the environmental stressor.”The“stressors”are a variety of physical,chemical,or biological activities that can cause negative reactions to ecosystems and the environment.1 In order to limit,and hopefully prevent,risky situations,the key is to assess and target the problems that could arise and then implement a system of metrics that help with prevention.

关键词： environmental compliance risk management swppp inspections erosion control ESC plans dewatering stockpiles seeding sediment control erosion prevention

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