Rainwater Harvesting Articles

  • Evaluation of the optimal size of a rainwater harvesting system in Sicily

    In the Mediterranean area, water scarcity represents a critical issue due to the increasing water demand related to the population growth and the expansion of urban and industrialized areas. Rainwater harvesting (RWH) may be an effective alternative water supply solution to deal with water scarcity in order to reduce non-potable water needs. The reliability of RWH systems is greatly affected ...


    By IWA Publishing

  • Experimental study on performance of sand filter layer to remove non-point source pollutants in rainwater

    Clogging characteristics of conventional sand filter layers with different grain-size distributions were experimentally studied to estimate their filtration capacity to capture non-point source pollutants in an artificial rainwater reservoir. A series of laboratory-scale chamber tests was conducted for artificial urban runoff synthesized with non-point source pollutants collected from a real ...


    By IWA Publishing

  • Hydrological performance of dual-substrate-layer green roofs using porous inert substrates with high sorption capacities

    Given that the common medium in existing green roofs is a single layer composed of organic and inorganic substrates, seven pilot-scale dual-substrate-layer extensive green roofs (G1–G7), which include nutrition and adsorption substrate layers, were constructed in this study. The effectiveness of porous inert substrates (activated charcoal, zeolite, pumice, lava, vermiculite and expanded ...


    By IWA Publishing

  • 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.

  • Modelling rainwater harvesting for commercial buildings

    Commercial areas are generally fully paved and with more impervious land cover than residential areas. This paper demonstrates a wall-mounted rainwater harvesting system designed to deal with limited land space. An arrangement of three tanks in series was used on a commercial shop lot where flat roofs generate large amounts of runoff. The system is compact, and can be installed and fitted ...


    By IWA Publishing

  • Historical development of rainwater harvesting and use in Hellas: a preliminary review

    The uneven temporal and partial distribution of water resources in Hellas, and especially southeastern regions, has resulted in the construction of various water systems for collection and storage of rainwater, since their very early habitation. Ever since, technologies for the construction and use of several types of cisterns and other relevant hydraulic strictures have been developed. The ...


    By IWA Publishing

  • 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

  • Quality assessment of rainwater and harvested rainwater stored in different types of cisterns

    Rainwater is widely collected and stored in cisterns for domestic use due to extreme water scarcity and poor water quality on the Loess Plateau, China. However, little information exists on the effects of cistern materials and construction methods on water quality. This study assessed the quality of rainwater and harvested rainwater stored in different types of cisterns, using multivariate ...


    By IWA Publishing

  • 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

  • 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

  • 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

  • Soil Retention at Village of Moreland Hills, Ohio - Case Study

    PROJECT SCOPE: The village of Moreland Hills, Ohio faced a challenge to re-tain soils in a problematic soft soil area. But, piling systems were expensive and a concrete solution in the natural environment was undesirable. Presto GEOWEB® earth retention system’s inherent qualities include its flexibility, ability to withstand reasonable differential settlement in soft soil environ-ments, ...


    By Presto Geosystems

  • 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

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