Construction Building your own pond or water garden can be hard work, but the results are extremely satisfying! Many do-it-yourselfers will consult a book, magazine article, or even a YouTube video before grabbing a shovel for their pond building project. Before putting spade to soil, remember that there are several things commonly overlooked by many a would-be water gardener. Starting with the design, ponds are too often placed in an unused area of the property or in a low spot that collects water.
Efficiency Case Study Introduction The treatment of stormwater runoff is a relatively new practice. The Clean Water Actmade us aware of the impact of pollutants on our water resources. The amendments to the Clean Water Act contain provisions that significantly increase efforts to address water quality in urban runoff.
It was nearly a decade after the original CWA before regulatory practices included management of stormwater runoff. Wet retention ponds, or National Urban Runoff Program NURP ponds as they have come to be called, became one of the most accepted and effective best management practices for treating runoff and removing harmful nutrients.
NURP ponds collect a variety of pollutants transported in the runoff. Nutrients such as nitrogen and phosphorous are common as are heavy metals.
However, sediment, or soil particles including organic particulatesconstitutes a large portion of the load received by the ponds. Sediment build-up quickly became a significant consideration as it was evident that excess sediment reduced the volume of water a pond was able to retain.
Studies have shown that this loss of capacity due to sediment also reduces the pond efficiency based upon the physics of a particle settling by gravity in a liquid medium and the life cycle of algae and how long it takes to convert soluble P to particulate Pa matter discussed later in this article.
It was evident that pond maintenance must be an integral component for each of these facilities. Initial estimates indicated that large ponds, those treating hundreds of acres, would require maintenance on an infrequent basis, perhaps every eight to twelve years or more depending on the condition of the drainage area.
The experience of one watershed district has proven differently. A regulatory revision in District rules required NURP ponds for stormwater management on many development projects. Maintenance agreements were mandatory on all of these projects and permits.
However, byworking under the assumption that pond maintenance was necessary on an infrequent basis, only one of the regional ponds had been dredged for sediment removal. Maintenance frequencies As a result of a growing concern over the number of ponds and other best management practices BMPand the ability to maintain an adequate phosphorous removal efficiency in these facilities, the MCWD Board of Managers requested District Engineer Mike Panzer of Wenck Associates, Inc.
He concluded that the residence or retention time, the length of time a given volume of runoff is retained in a pond was critical to its removal efficiency. Furthermore, the rate of sediment accumulation was a direct factor in reducing residence time.
In other words, a reduction in volume is proportional to a corresponding reduction in residence time, as illustrated in Figure 1.
Other factors related to better pond maintenance were also made evident and are shared here to improve the overall approach to pond maintenance. Inspections in the winter and spring of on four of the regional ponds revealed significant deposits of sediment. The ponds to be excavated were:Pond Flower Carrying Cases This case is great to hold your Coins, cosmetics, digital cameras or other small personal items.
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Painted and other aquatic turtles can thrive in backyard turtle ponds. Basking turtles appreciate deep water that they can plunge into when alarmed. Live plants in a pond can provide turtles a place to rest, and they provide cover, too.
Aquatic turtles are among the most popular of reptile pets. I. Case Study: Lower Piper Creek and Upper and Lower Goat Creek, Montana Goat Creek is a tributary to Swan River, which is situated in a heavily forested watershed in northwest Montana.
Construction of forest roads and timber harvesting led to sediment and nutrient pollution in Goat Creek, which made the creek unable to adequately support aquatic.
Lakes and Ponds Program The Division of Conservation and Recreation works hard to protect the habitats and recreational opportunities of our lakes and ponds.
Our Lakes and Ponds Program works primarily in the DCR State Park system to protect, manage and restore our valuable aquatic resources.