Page 066 - water collection because the water is obligated to downstream users.
Source section: Section 4 - Green Building Core Concepts and Application Strategies PDF page: 66 Guide page: 59 OCR quality: high (343 words)
OCR Text
Rainwater management can also include the collection and reuse of water for nonpotable purposes, such as landscape irrigation, toilet and urinal flushing, and custodial uses. This helps reduce rainwater runoff while avoiding the unnecessary consumption of potable water. It is important to understand a region’s environmental conditions when selecting a rainwater management strategy. For example, in the eastern United States, on-site water collection is often encouraged as a way to slow rainwater runoff and reduce nonpoint source pollution. Conversely, in some western states, long-standing water laws prohibit on-site water collection because the water is obligated to downstream users. SS STRATEGIES FOR RAINWATER MANAGEMENT THROUGH DESIGN:
- MINIMIZE IMPERVIOUS AREAS. Increase the area of permeable surfaces, such as vegetated roofs, porous pavement, and landscaped areas.
- CONTROL RAINWATER. Install dry ponds, rain gardens, bioswales, and similar landscape features designed to hold water and slow the rate of runoff.
- INCORPORATE RAINWATER MANAGEMENT INTO SITE DESIGN. Use features that serve multiple functions, such as planters that collect rainwater, streets that include bioswales to capture and hold rainwater, and mulch that both builds soil and holds moisture. ees] eee STRATEGIES FOR RAINWATER MANAGEMENT IN OPERATIONS AND MAINTENANCE:
- REDIRECT RAINWATER. Direct runoff into rain gardens, bioswales, and other landscape features that retain water. ¢ HARVEST RAINWATER. In many jurisdictions, collected water can be used as process water, to flush toilets, or to provide irrigation. SSS Cities are typically warmer than nearby rural areas. The flat, dark surfaces of roadways, parking lots, and tarred rooftops absorb and retain the sun’s heat during the day and are slow to radiate it at night. The result, knownas the heat island effect, is an increase in air temperature in a developed area compared with an undeveloped area. The increased heat absorption in urban areas has several consequences:
- The additional use of air-conditioning increases energy demand and costs. The rise in energy costs is dramatic because the highest demand for air-conditioning occurs during peak hours for energy consumption.
- Wildlife species not adapted to the higher temperature (and related effects including changes in resource availability) decline. vv z 2 Bb oO Ww un 59