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{{TextBox|1=Rainwater harvesting is an ideal technology for:
{{TextBox|1=Rainwater harvesting is an ideal technology for:
*Sites which cannot infiltrate water owing to contaminated soils or shallow bedrock,
*Sites which cannot infiltrate water owing to contaminated soils or shallow bedrock,
*Zero-lot-line developments such as condos or dense urban infill, or conversely
*Zero-lot-line developments such as condos or dense urban infill, or conversely
*Projects with extensive gardens and landscapes which would benefit from free irrigation water.}}
*Projects with extensive gardens and landscapes which would benefit from free irrigation water.}}
<p><strong>The fundamental components of a rainwater harvesting system are:</strong>
<p><strong>The fundamental components of a rainwater harvesting system are:</strong>
*the [[catchment area]] where the rain lands (e.g. rooftop),
*the [[catchment area]] where the rain lands (e.g. rooftop),
*pumps to lift water to higher elevations, depending on the layout of the components,
*pumps to lift water to higher elevations, depending on the layout of the components,
*additional water filtration and treatment, depending on the intended use of the water. </p>
*additional water filtration and treatment, depending on the intended use of the water. </p>
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<gallery mode="packed" widths=300px heights=300px>
<gallery mode="packed" widths=300px heights=300px>
STEP Minto Cistern P1 - Copy.jpg| Rainwater harvesting is commonly employed on zero-lot-line projects like downtown condos. This cast in place concrete vault in one corner of the parking level is a typical design.
STEP Minto Cistern P1 - Copy.jpg| Rainwater harvesting is commonly employed on zero-lot-line projects like downtown condos. This cast in place concrete vault in one corner of the parking level is a typical design.
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===Planning Considerations===
===Planning Considerations===
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<gallery mode="packed" widths=300px heights=300px>
<gallery mode="packed" widths=300px heights=300px>
Overground RHW.jpg| An above-ground cistern. This system is not frost proof, and would have to be drained and closed during winter.
Overground RHW.jpg| An above-ground cistern. This system is not frost proof, and would have to be drained and closed during winter.
Agc1.png| An above-ground cistern used for sub-surface irrigation. A filter box is included on the roof drain, no further treatment is shown. The overflow is connected to an underground infiltration area.
Agc1.png| An above-ground cistern used for sub-surface irrigation. A filter box is included on the roof drain, no further treatment is shown. The overflow is connected to an underground infiltration area.
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===Design===
===Design===
<h4>Sizing & modeling</h4>
<h4>Sizing & modeling</h4>
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<gallery mode="packed" widths=300px heights=300px>
<gallery mode="packed" widths=300px heights=300px>
RAINWATER HARVESTING TANK 550x550.jpg | Large cistern being installed underground
RAINWATER HARVESTING TANK 550x550.jpg | Large cistern being installed underground
RWH.gif| Conceptual diagram of an underground cistern being used for irrigation
RWH.gif| Conceptual diagram of an underground cistern being used for irrigation
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