Stream H: Water Conservation and Sustainability

 

9.1 Stormwater management and water conservation through rainwater harvesting

9.2 The Englishman River water service aquifer storage recovery project

9.3 Water conservation planning resources for BC

9.4 Prevention of water leakage and the development of a water-saving city

 


  

9.1 Stormwater management and water conservation through rainwater harvesting

Presented By: Andrew Kolper. Kerr Wood Leidal Associates Ltd.
Time: Tuesday, 8:00 - 8:30 AM

Non-potable water systems are emerging as not only a way to reduce the consumption of potable water, but also as a viable stormwater management tool. In March 2013, amendments to the Drinking Water Protection Regulation exempted non-potable water systems from the Drinking Water Protection Act (DWPA) Act. This breakthrough legislation, in addition to the recent changes to the BC building and plumbing codes, means that non-potable water supply is now permitted for any end use, except those used for human consumption or food preparation.

These changes to the DWPA, which complement the updated BC Building Code, pave the way for rainwater reuse in this province by clearing away the plethora of prohibitive regulatory barriers. Now is the time to take a closer look at the technical and financial opportunities in rainwater harvesting and reuse. This presentation will provide an overview of the regulatory changes, examine potential reuse and stormwater management solutions that rainwater harvesting offers, and examine some of the final regulatory hurdles (such as antiquated cross-connection requirements). Examples of reuse strategies implemented in the Lower Mainland will be presented.

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9.2 The Englishman River water service aquifer storage recovery project

Presented By: Dennis Lowen, Lowen Hydrogeology Consulting Ltd
Time: Tuesday, 8:30 - 9:00 AM

Aquifer storage recovery (ASR) is a powerful technology for water resources management and environmental protection, enabling storage deep underground when water is available, for recovery when needed to meet urban, agricultural, ecosystem, industrial, recreational, emergency, and other water uses. The same wells are used for both recharge and recovery. Water is stored in suitable aquifers, or water-bearing formations, forming large subsurface reservoirs that are safe from losses due to evaporation, transpiration, seepage, or contamination.

Aquifer Storage and Recovery (ASR) is a relatively new technology that is intended to manage peak demands and reduce overall demand on water treatment plants. The project will facilitate excess water from the Englishman River to flow through the treatment plant, and into wells in the wet season. In the summer months, water will be withdrawn from the wells and pumped into the distribution system. The project is the first of its' kind in BC and just the second in Canada.

The project objective is to store 1 million cubic meters of water annually to provide a supply of 15 ML per day in the dry season. This will allow a one-third reduction in the size of the water treatment plant as flow from the ASR wells will help meet peak demands. The project is currently in the second phase of feasibility studies. The first phase identified suitable areas for development and the second phase has included exploration drilling and ASR well construction and testing. Our presentation will give an overview of the project progress to date.

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9.3 Water conservation planning resources for BC

Presented By: Madelaine Martin, Ministry of Community, Sport, & Cultural Development.
Time: Tuesday, 9:00 - 9:30 AM

Water conservation is a valuable source of 'new' water for communities. Developing a plan for how you will conserve water saves your utility money on treatment, distribution, and new infrastructure costs and protects your local environment. How is an effective plan developed? The presentation will cover the seven steps in water conservation planning and introduce two newly available planning resources. The Local Government Infrastructure and Finance Branch of the Ministry of Community, Sport, and Cultural Development, POLIS Project on Ecological Governance, and Okanagan Basin Water Board have collaborated to develop an updated Water Conservation Guide for BC communities. The Guide includes instructions, a case-study example, writing checklists, data worksheets, and a resources list. The Water Conservation Calculator is another free, online resource developed by the Ministry that you can use when developing your water conservation plan. The Calculator allows you to easily explore the water savings from different water conservation measures and to produce graphs to share with decision makers.

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9.4 Prevention of water leakage and the development of a water-saving city

Presented By: Junichiro Yamashita, Water Pipe Management Center, Matsuyama Municipal Enterprise.
Time: Tuesday, 9:30 - 10:00 AM

Matsuyama is the capital city of Ehime-Prefecture located in Southwestern Japan, consistently supplying 485,000 people with 140,000 cubic meters of water every day. Unfortunately, we have long been threatened with water shortages. This paper attempts to describe how we can further lower our leakage rate of water usage below its current state of 2-3%. Also provided here is how to develop water-saving technologies and ways to raise user awareness of water conservation. Water leakage undoubtedly adversely affects the financial viability of water utilities. We, accordingly, introduced some water-pressure-control-systems twenty-five years ago. These measures brought about a significant breakthrough, and water loss was successfully reduced from 20 to 8%. Other key factors for our success were implementation of acoustic investigations into underground leakages and regular renewal of water-mains. Our city experienced a disastrous drought twenty years ago and has repeatedly been faced with water scarcity. Hence, we specifically aim at advancing the concept of water conservation and currently succeed, year after year, at raising user awareness. Furthermore, we introduced water-saving faucets thirty years ago and responsibly installed them in the great majority of all housing units, and since that time, we have consistently updated and informed users of the benefits of their utilizing this technology. In this study, the main stress falls on the aforementioned items and some new technologies: an underground integrated-meter-unit and some quakeproof water pipes we recently introduced. The presentation will delve deeply into detailing and describing our most exciting emerging methods and technologies.

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