Storm water detention ponds or retention ponds are needed when development takes place on a watershed, because the storm water runoff rate and amount typically increase due to the development. Download spreadsheets containing Excel formulas to make the calculations of volume needed for storm water detention ponds using three different hydrologic models.

Sep 10, 2015· In broadest terms, construction aggregate is washed to make it meet specifications. Specifically, however, there is more to the function of water in processing aggregate than mere washing. Among these functions are: Removal of clay and silt. Removal of shale, coal, soft stone, roots, twigs and other trash. Sizing.

Jan 02, 2020· Make sure that your pond or lake has sides that gradually slope as opposed to being steep, for easier exit and entry for ducks. Shallow banks will also better enable aquatic and marginal plants to grow easily, which in turn will attract ducks.

6 Recommended Vegetation Species To Plant Around Your Lake or Pond. Maintaining dense beneficial vegetation around your lake or pond is extremely important for improving water quality, preventing erosion and controlling nuisance geese. Establishing buffer .

A good pond site will have a sufficient depth of clay in the soil for the construction of the levee, core of the dam, and excavated basin of the pond. NRCS Agriculture handbook Number 590: PondsPlanning, Design, Construction provides a detailed guide to building a pond.

Mar 16, 2019· The truth is, the longer a retention pond or wetland exists, the more likely it is to create a nuisance which will eventually bring down property values. Here's why. Poor or nonexistent HOA maintenance. Most privately owned retention ponds and wetland preserves (or conservation areas) are poorly maintained and managed.

• Don't let grass clippings into the pond. • Plant, don't pave. Ground cover minimizes runoff. • Add more swales and berms to your yard.

Retention and detention ponds need periodic maintenance. If you are a property manager or part of a homeowners association, you will want to ensure that your retention or detention pond is cleaned out on a regular basis to ensure compliance with city and county codes. Retention Pond or Detention Pond Maintenance Checklist

Remove the aquatic pond plants from their planting container if they were planted in soil when purchased. Rinse the potting soil from the plants' roots with a hose. Remove any spray attachment from the hose, and allow the water to simply pour over the roots, and rinse away the soil.

Some catch basins direct the runoff to pipes that drain into retention ponds. How do the retention ponds act as a natural filter? Sediment in the runoff settles down in the calm waters of the retention pond, and chemicals, such as lawn fertilizers, are consumed by naturally occurring aquatic vegetation. As a result of natural processes, cleaner water slowly drains from the retention ponds into the rivers.

This will boost any natural dyingoff of the bacteria, and help renew any culture loss as a result of the cleaning cycle, topping up the pond with tap water and so on. 3. You MUST be patient. You can expect the water to start to look cleaner due to solids filtration within a couple of days, gradually clearing over a couple of weeks, but the biological effect to clear the green water will take considerably longer, .

The intended pond use and the soil at the site also affect the design of the side slopes. Soils with high clay content are more stable on a steeper slope than soils with less clay. Ifthe pond is intended to provide wetland habitat, it. should have more shallow slopes (5:1 or less) to encourage aquatic plant growth and wildlife. Keep in mind that

No need to make the pond any deeper in the middle than 1m. This will make it easier to maintain, trim plants and repair the pond. Puddle the clay thoroughly until all air bubbles have been squeezed out. One way of doing this is to tie a whacker plate' on a rope and let it .

Jul 24, 2015· If no permit is required, there are expert pond builders in most rural areas that are qualified to design and build a basic farm pond. After you do your homework to determine practicalities of building a pond on your land, reach out to your neighbors for references on local pond builders.

These ponds range in size from less than one acre to over 30 acres in size. Unfortunately, many of these ponds are so poorly constructed that they fail to serve the purpose for which they were originally designed; some may be unsafe. Until recently, little concern was shown for construction safety in building farm pond dams.

control of urban pollutants. As such, maintaining your detention pond is an important part of Michiganʼs environmental protection efforts. Do you have a detention pond near your property? If your development was built after the mid1980s, it may have a detention pond that manages storm water runoff.

How to build a floating trash island Artificial floating islands can be used to clean urban bodies of water. Any polluted canal, river, estuary, lake in a city park, or storm water retention pond would benefit from .