生态

湿塘实景

can provide effective flood control, streambank erosion control, removal ofparticulate and soluble contaminants, and limited groundwater recharge (depends onsoil conditions)

湿塘能够有效地控制洪涝和河道侵蚀，去除水体中的颗粒物以及溶解性污染物，还能有限量地补给地下水（取决于土壤渗透性）。

one of the most aesthetically pleasing structural BMPs – can increase property value

湿塘是一种非常具有观赏性的雨水最佳管理措施-具有增值属性。

can include other uses – recreation, fish and wildlife habitat or wetland

湿塘还兼具消遣娱乐、鱼类与野生动物栖息地、生态湿地等其他用途

湿塘平面

wet ponds are more expensive than extended detention dry basins – permanent pool,volume two to seven times larger than extended detention dry basin (WEF, 1998)

湿塘的造价成本较延时滞留干塘高很多，但是蓄水量是后者的2至7倍。延时滞留干塘是一种永久性水塘。

wet ponds accomplish removal of soluble contaminants such as nutrients (important if receiving waters are sensitive to nutrient inputs)

湿塘能够完全去除水中溶解性污染物，如含养物质，这一优势对于那些含养物质敏感性很强的受纳水体水是很重要的。

wet ponds are most cost effective in larger catchments

在集水面积或流域面积很大的地方，湿塘更能显示出其成本效益优势。

provides some infiltration unless lined

湿塘作用在于渗透而是直排。

temperature increase is a concern on coldwater streams capable of supporting trout or salmon – minimize use of riprap and provide shading vegetation to reduce warming

气温升高对于能养殖鳟鱼或大马哈鱼的冷水流是非常不利的，而湿塘需要减少筑砌硬质护坡，多提供遮荫植被降低水体温度。

湿塘剖面

inadequate maintenance can lead to problems with floating debris and scum, algae,
odours, and insects

不正当的维护会导致湿塘内出现浮渣、藻类、臭气、昆虫等问题。

some safety concerns associated with side slopes, water pool

湿塘的设计需要考虑边坡和水深等安全性问题。

see Section 4.21 for overview cost benefit analysis

更多关于湿塘的成本效益分析详见《Best Management Practices Guide for Stormwater—BMP S6: Wet Pond》Section 4.21。