Rainwater Harvesting Articles

  • 10 Uses of Rainwater

    Collecting your own rainwater is an excellent way to conserve this precious resource. A basic rainwater collection system catches rainwater from your roof or other surface and channels it into a container for storage. Rainwater itself is generally clean, but it can pick up microorganisms, pollutants and debris when it hits your roof. This is why systems for rainwater use inside your home often ...


    By Climate, Inc.

  • Economic feasibility of rainwater harvesting systems: a systematic literature review

    Rainwater harvesting (RWH) systems are increasingly being used as an alternative source of water supply. However, their installation is not often financially feasible. The feasibility analysis of such investments is carried out by traditional techniques that have uncertainty limitations. Thus, the objective of this study is to describe how the studies concerning the economic feasibility of RWH ...


    By IWA Publishing

  • Porirua New Zealand – WaStop® DN225 - Case Study

    Porirua City located 20 km north of Wellington has over 70 storm water outlets into the harbour. A number of these outlets are very flat on their approach to the harbour which generally means they are severely influenced by high tides. The problem with these outlets is that if a rain fall event coincides with a high tide, the ability of the storm water network to discharge is severely restricted. ...


    By Wapro AB

  • 100 Simple Ways To Save Water

    To improve water conservation install a rain sensor, it turns off your irrigation when it rains. Use a weather-based controller. The use of smart controllers can reduce water usage 24% a year on average. Learn about available rebate programs ...


    By Jain Irrigation, Inc

  • Design and management of rainwater harvesting systems to control water quality for potable purposes in Cu Khe, Vietnam

    There are debates about whether rainwater is suitable as drinking water. A serious shortcoming of the debate is that there are differences in the design and management of rainwater harvesting (RWH) systems. This study is based on the performance of two RWH systems that are used for drinking purposes at a kindergarten and a primary school in Cu Khe, Vietnam. Each system comprised a painted ...


    By IWA Publishing

  • Grey Water In Action: But What Exactly Is It?

    Last month here in the RainCatcher blog we touted the benefits of collecting, filtering, treating, storing and re-using water that lands on your roof, explaining Rainwater Harvesting to those not already in the know: ...

  • Storm Water Plan Case Study

    Global was contracted by a local Road Commission site. The Road Commission site serves as the county level road agency, which maintains more than 1,813 miles of roads and streets and over 250 signalized intersections. The Road Commission contains six sites across the county. Each site is responsible for its particular area. The sites all include maintenance garages, diesel and gasoline ...

  • Sustainability evaluation of a primary school rainwater demonstration project in Tanzania

    Water shortages are widely prevalent in developing countries, affecting lives of people including schoolchildren, who miss classes while fetching water for daily use. A typical case was that of Mnyundo Primary School in Tanzania, East Africa. A rainwater harvesting (RWH) system was then constructed because of easy adaptability of the technology. The purpose of this study is sustainability ...


    By IWA Publishing

  • Case study - Algae control in fire reservoir Häagen Dasz production facility

    A 77 meter rainwater reservoir for fire extinguishing purposes was completely covered with filamentous green algae. The green filamentous algae clogs regularly filters located before the jockey pumps.  The Challenge: Control Green Algae and Lower the Use of Oxygen Peroxide Located in Tilloy-lès Mofflaines, France, the 77 meter long rainwater reservoir for fire ...


    By LG Sonic

  • Bacteriological assessment of aquifer storage and recovery (ASR) water in southwest coastal Bangladesh

    Safe drinking water is scarce in southwest coastal Bangladesh. Harvested rainwater and rain-fed pond water are the main sources of drinking water for people living in this area. Both government and non-government organizations are promoting aquifer storage and recovery (ASR) schemes to provide safe drinking water for this population. This study assessed the bacteriological quality of both ...


    By IWA Publishing

  • Evolution of rainwater harvesting and use in Crete, Hellas, through the millennia

    The low water availability in several regions of southeastern Hellas and particularly in several islands, such as Crete, has resulted in the construction of various types of water reservoir for collection and storage of rainwater, since their very early habitation. Since then, technologies for the construction and use of several types of cisterns have been developed. In Crete during the Minoan ...


    By IWA Publishing

  • Stochastic modelling of the hydraulic performance of an onsite rainwater harvesting system in Mediterranean climate

    The performance of onsite rainwater harvesting (RWH) system in Mediterranean climate was assessed. A stochastic model quantifying the necessary storage, as a function of rainfall (frequency, depth), roof area, residents’ number, specific water use (toilet flushing, laundry) and the required efficiency was developed. Two performance indicators were calculated: water saving efficiency (RSE) – ...


    By IWA Publishing

  • An examination of factors affecting sustainability of domestic rainwater harvesting systems in a rural, semi-arid region of Mexico

    Rainwater harvesting (RWH) is increasingly utilized today by populations to alleviate water supply issues, particularly in rural, dry environments. Limited research has considered, simultaneously, the numerous factors that contribute to sustainability – for example, social acceptance, water quality, and maintenance needs – of RWH. This research aimed to improve the understanding of factors ...


    By IWA Publishing

  • Depleting groundwater – an opportunity for flood storage? A case study from part of the Ganges River basin, India

    Storing excess rainwater underground can become key in mitigating the frequency and magnitude of flood events. In this context, assessment of depleted groundwater storage that can be refilled in water surplus periods is imperative. The study uses Gravity Recovery and Climate Experiment (GRACE) data to identify variations in groundwater storage in the monsoonal Ramganga River basin (tributary ...


    By IWA Publishing

  • Rainwater tanks in modern cities: a review of current practices and research

    Rainwater tanks often provide a reliable and affordable water supply source in rural and remote areas where piped water supply systems are unfeasible due to economic considerations. However, over recent decades there has been an increase in the adoption of rainwater harvesting as part of the water supply source mix in modern cities. The uptake of rainwater harvesting has been influenced by the ...


    By IWA Publishing

  • Modelling runoff on ceramic tile roofs using the kinematic wave equations

    Generally, roofs are the best candidates for rainwater harvesting. In this context, the correct evaluation of the quantity and quality of runoff from roofs is essential to effectively design rainwater harvesting systems. This study aims to evaluate the performance of a kinematic wave based numerical model in simulating runoff on sloping roofs, by comparing the numerical results with the ones ...


    By IWA Publishing

  • Community-based rainwater harvesting (CB-RWH) to supply drinking water in developing countries: lessons learned from case studies in Africa and Asia

    This paper uses pragmatic findings and lessons learned from three case studies to deduce that community-based rainwater harvesting (CB-RWH) is an innovative solution to develop sustainable drinking water supply systems in developing countries, especially in Africa and Asia. Taking advantage of traditional community-based activities in African and Asian villages, the water supply system can be ...


    By IWA Publishing

  • Big data and hydroinformatics

    Big data is popular in the areas of computer science, commerce and bioinformatics, but is in an early stage in hydroinformatics. Big data is originated from the extremely large datasets that cannot be processed in tolerable elapsed time with the traditional data processing methods. Using the analogy from the object-oriented programming, big data should be considered as objects encompassing the ...


    By IWA Publishing

  • Contributions to the design of rainwater harvesting systems in buildings with green roofs in a Mediterranean climate

    Green roofs (GRs) are becoming a trend in urban areas, favouring thermal performance of buildings, promoting removal of atmospheric pollutants, and acting as possible water collection spots. Rainwater harvesting systems in buildings can also contribute to the management of stormwater runoff reducing flood peaks. These technologies should be enhanced in Mediterranean countries where water ...


    By IWA Publishing

  • Performance evaluation of rainwater harvesting system and strategy for dry season challenge

    The extensive application of rainwater harvesting (RWH) projects is inhibited by the challenge posed by the dry seasons. In a case study of Mnyundo Primary School, Tanzania, the performance of the RWH system was evaluated using a daily water balance model. The methodology is based on defined dry season parameters – no water days (NWDs), rainwater usage ratio (RUR), and water level in local ...


    By IWA Publishing

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