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13. Drainage
- www.lee-county.com
- (A primer on Drainage in Lee County and Southwest Florida. ...
- This document will explain how most of Lee County's drainage systems function and when you as a customer should call the Operations Division for action. ...
- "WHEN IS DRAINAGE A PROBLEM?" will try to answer your questions concerning drainage in your area, and define the basic core levels of drainage service. ...
- HOW DRAINAGE WORKS:.
- For the most part, the drainage systems of Lee County function by way of a series of swales. ...
- Drainage is an important issue for the people of Lee County. We all need to understand the basics of how drainage works, when a drainage problem exists and how to protect our swales. ...
- "WHEN DRAINAGE IS A PROBLEM". ...
14. OPERATING CONTROLLED DRAINAGE AND SUBIRRIGATION SYSTEMS
- www.bae.ncsu.edu
- OPERATING CONTROLLED DRAINAGE AND SUBIRRIGATION SYSTEMS .
- Dual-purpose drainage/subirrigation systems are now being used on poorly drained soils to reduce water-related stress on crops. ... During wet periods this system operates as a drainage system (Figure 1). ... When a structure (such as a flashboard riser) is used in the outlet ditch to regulate the drainage rate, the system may function in either the controlled drainage or subirrigation mode. Usually a weir is placed in the control structure so that the water level in the drainage outlet has to rise higher than the weir crest before the water will flow out of the field.
- The process called controlled drainage occurs when the structure is used to conserve water by reducing drainage outflows and when no additional water is pumped in. During dry periods, water may be pumped into the control outlet where it moves back through the drainage network, thus raising the water level in the field. ...
- The dual-purpose system will normally fluctuate between the drainage, controlled drainage and subirrigation modes several times during one cropping season. ...
- Three modes of operation for a water management system: drainage, controlled drainage and subirrigation.
- The best crop response for a drainage/subirrigation system will be realized with a system that is specifically designed to serve both purposes. Systems whose designs focus on drainage are, in general, not adequate to function in both modes. ... Another way to overcome some limitations would be to increase the drainage intensity of the system by installing additional tile lines between existing lines. This additional drainage capacity is needed when the water table rises, a condition which decreases the drainage capacity of any subsurface system. Land shaping to improve surface drainage may also be needed, especially on an existing system with limited drainage capacity.
- If a new system is to be installed for both drainage and subirrigation, the system's size and layout must satisfy the water management needs of the specific site. ...
- The final design of the drainage/subirrigation system should be evaluated using the water management simulation model, DRAINMOD. For initial planning purposes, subirrigation/drainage requires about 65 percent of the spacing normally needed for drainage alone. Drain tubing depth should be about 3 to 4 feet which is somewhat shallower than the depth for conventional drainage. ...
15. The Prickwillow Drainage Engine Museum
- web.ukonline.co.uk
- This website was set up in 1996, when I had a holiday cottage in the village, to tell the story of the Prickwillow Drainage Engine Museum, and something of the history behind the drainage of the Fens. ...
- Prickwillow Drainage Engine Museum .
- The Drainage Story .
- The Romans used substantial areas of the fenland for agriculture and in order to do so had to undertake drainage work. ... The drainage need would not have been so complicated as today because, at that time, the surface was 20'0" higher than the present land level. It was therefore above sea level and only a gravity drainage system had to be constructed. ... In 1634, a group of Fenmen known as "The Adventurers", assisted by the Dutch engineer, Cornelius Vermuyden cut the Old Bedford river by agreement with the Earl of Bedford and the drainage of the Fens began. ...
- In 1958 the writing was on the wall for the Mirrlees engine as drainage pumping switched to electric pumps. ...
- Acquired by the Museum in 1984 from Southery Fen, where it used to drive a drainage pump until about 1957. ...
- It had driven a drainage pump connected to the far side flywheel from about 1930 in Acre Fen, Chatteris. ... It is interesting to note that as with all these engines, they were not specifically designed for drainage purposes and some of the older members of the Museum Trust recalled, in 1990, that a similar engine to this was tucked into a shed just off the market square in Ely. ...
- 5 brake horse power engine drove a drainage pump on Soham Mere from 1939 to 1980. ...
- There are display areas showing collections of old tools and implements associated with the drainage of the Fens, and numerous photographs depicting life in the Fens. ...
- A PAL VHS video Prickwillow Drainage Engine Museum: The Transformation 1993 - 1996 by Basil L Gooch is available from the Museum shop. ...
- Drainage Engines of the Fens .
- We now have a new PAL VHS video for sale called "Drainage Engines of the Fens" which gives a brief history of Fenland drainage followed by detailed shots of the starting and running procedures for the engines in the collection. ...
16. Berkeley Parents Network: Drainage Work
- parents.berkeley.edu
- Drainage Work .
- Berkeley Parents Network > Reviews > Home Repair & Household Services > Drainage Work .
- Downspouts & drainage 4/04 .
- Expert advice needed about drainage problem 11/03 .
- Drainage expert for swampy backyard 3/03 .
- We initially met him at a drainage seminar at Truitt and White. ... We had them come and do a french drain drainage system for us when we moved into a new house and knew there was seepage into the basement which we wanted to be able to use in the winter. They did their work on time (actually finished early), on budget (was the mid-range of the bids we got), and best of all we have had no drainage problems for the last two years since the work was done. ... He come up with a simpler solution then the engineer, and our basement has been dry for the past three years--at a fraction of the cost! His number is 510-232-9122 Warren An excellent drainage contractor is Steve Sanchez of All Seasons Construction 510-685-0046. ...
- Our neighbors have proposed this idea: they need to install a drainage system under their retaining wall and backyard, a french drain. ... concerned neighbor This is according to my husband the drainage contractor. ... In theory there are ways that you could tie in an existing drainage system. ... However even assuming you have the perfect combination of variables, he would highly discourage sharing a drainage system. ...
- We talked to two drainage companies, and both of them suggested to have a french drainage installed except the price from one bid was doubled than the other bid. Why would the price differ by that much? Has anyone had french drainage installed lately? Any advice on the drainage companies to choose from and what to watch out for? Thank you so much. ...
- That said, though the cost of french drains suggests that they are some perfect solution to all drainage woes, in many cases there are more effective, less expensive approaches, especially with the type of moisture found in the East Bay. ...
17. Archives of URBAN-DRAINAGE@JISCMAIL.AC.UK
- www.jiscmail.ac.uk
- Archives of URBAN-DRAINAGE@JISCMAIL. ...
- Urban drainage systems .
18. Pavement Subsurface Drainage Systems
- www.usroads.com
- Pavement Subsurface Drainage Systems .
- (The following information is reproduced from the National Cooperative Highway Research Program NCHRP Synthesis of Highway Practice 96: Pavement Subsurface Drainage Systems published in November of 1982 and from NCHRP Synthesis 239: Pavement Subsurface Drainage Systems published in 1997 to update the 1982 synthesis. ...
- --> NCHRP Synthesis of Highway Practice 96: Pavement Subsurface Drainage Systems .
- Drainage of water from pavements has been an important consideration in road construction for more than 2000 years. ...
- Free water is the form of most concern to the designer because it can decrease the strength of the pavement and is the only form of water that can be significantly removed by gravity drainage. ...
- The drainage designer is primarily concerned with saturated gravity flow, which can be determined by application of Darcy's law. ...
- To understand and analyze the conditions under which the pavement must function, the designer needs information on highway geometrics, surface drainage, nonpavement subsurface drainage, climate, and soil properties. ... Two general types of subsurface drainage criteria are used: (a) a time for a certain percentage of drainage or (b) an inflow-outflow criterion. ...
- The free water can be removed by draining vertically through the subgrade or laterally through a drainage layer. Several combinations of criteria and equations can be selected to calculate the required permeability of the drainage layer. The criterion selected has much more influence than the equation used; therefore, the drainage criterion should be selected carefully. Then the drainage layer and/or base can be designed to meet the selected criterion. ...
- Among the conclusions of this synthesis are that Darcy's law is adequate for the design of subsurface drainage systems; subsurface drainage systems will only drain free water, for the primary source is infiltration; water held in the pavement structure by capillary forces cannot be removed by subsurface drainage systems; and permeability requirements for lateral flow are high because of low hydraulic gradient and small area of flow. The infiltration of free water into the pavement structure, its effect on material strength, and its removal by vertical flow or by a lateral subsurface drainage system should be an integral part of the pavement structural design process. ...
- The observations that many pavements are subject to moisture-related problems has convinced many engineers that subsurface drainage design criteria and principles should be part of the pavement structural procedure. ...
- The design of subsurface drainage for pavement structures is not difficult, but it is site- specific. ...
19. USDA Agricultural Research Service
- www.ars.usda.gov
- IRRIGATION & DRAINAGE.
- You have entered a directory of USDA-Agricultural Research Service (ARS) irrigation and drainage research information. ... Accomplishments and publications (the latter available free to the public) since 1992 are also included for each of the 14 ARS irrigation and drainage locations. ...
- The directory is intended as a guide to users and potential users of irrigation and drainage technology developed by ARS. ...
- invite exchanges between ARS and end users that will help guide the development (planning, implementation, and evaluation) of irrigation and drainage research projects; and .
- strengthen and build on the traditional lines of communication among irrigation and drainage researchers, end users, and other stakeholders for the sharing of information. ...
- Dale Bucks, ARS National Program Leader for Water Quality and Water Management, would welcome your comments, questions, and suggestions about the Irrigation and Drainage Directory (phone 301-504-7034, fax 301-504-5467; e-mail dab@ars. ...
20. AQUASTAT - FAO's Information System on Water and Agriculture
- www.fao.org
- Drainage.
- Drainage.
- In the northern regions, like the Baltic States, parts of Eastern Europe and the Russian Federation, drainage is necessary to cultivate the low-lying and/or swampy areas. In addition, drainage might be necessary for construction purposes. ...
- Regional distribution of drainage methods.
- Surface drainage.
- Subsurface drainage.
- Total drainage.
- In the drier areas of Central Asia and in part of the Caucasus, drainage is related to irrigation. One of the measures necessary to prevent irrigation induced waterlogging and salinization in arid and semi-arid areas is the installation of drainage facilities. Drainage, in combination with adequate irrigation scheduling, enables the leaching of excess salts from the plant root zone. ...
- Drainage was initially used to remove excess water. However, due to over-drainage it subsequently became necessary to irrigate. ...
- Subsurface drainage is practised on 56% of the drained area. It is most widespread in the regions where drainage is more important than irrigation, like in the Baltic States, where 89% of the drained area is drained through subsurface drains (Figure 17 and Table 8). In Central Asia, drainage takes place mainly through open drains. Subsurface drainage in this region is practised on only 26% of the drained area, ranging from less than 4% in Kazakhstan to 44% in the Kyrgyz Republic. In general, newly reclaimed areas are equipped with subsurface drainage facilities rather than surface drains.
21. International Network for Acid Prevention
- www.inap.com.au
- What is Acid Drainage? ° Acid Drainage Links ° Acid Drainage Events .
- View the PIRAMID Guidelines by the Passive In-situ Remediation of Acidic Mine / Industrial Drainage organization!.
- Acid drainage is one of the most serious and potentially enduring environmental problems for the mining industry. ... Effectively dealing with acid drainage is a formidable challenge for which no global solutions currently exist.
- INAP exists to fill the need for an international body which mobilizes acid drainage information and experience. ...
- Home · About Us · Acid Drainage · Our Partners · ICARD · Research Project · Members Area .
22. How to install a lawn drainage system
- www.gardenadvice.co.uk
- Lawn drainage- solving a soggy lawn problem.
- uk lawn experts show you how to install a drainage system in your lawn with the minimum of hassle. Most drainage system are based on agricultural system which can be very ineffective in a garden lawn or a sports ground set up, the key to designing and installing drainage system in a lawn is to remember that the water must be able to travel from the surface to the drain which is installed under the lawn.
- Firstly you must consider the fact that all drainage systems work because water will always flow to the lowest point, so you need to design the system so that the drainage water will drain to the lowest point in your garden, into a ditch or soak away. To achieve this all the drainage pipes you install must all have a fall on them no less than 1 in 200 in the direction you wish the water to flow ( ideally 10 m/m fall for every metre of pipe laid ).
- uk free advisor service how will produce you a basic plan for a drainage system. ...
- Once you have completed the first trench you should fill the trench with 20 m/m of 10 to 12 m/m clean stone , then place a 75 m/m perforated drainage pipe on top of it. ...
- next back fill the trench on top of the drainage pipe with the clean stone to approximately 75 m/m from the top of the trench. ...
- the next stage is to make a series of slit trenches at right angles to the drainage pipes across the lawn with a spade at 400 m/m centres about 75 m/m deep and fill them with a washed sand, it is important that the slits connect with washed stone over the main pipes you should be able to feel the stone with the spade as you form the slit.
23. McKinney General Information
- ub.mckinneytexas.org
- Drainage Charges.
- Drainage Charges.
- It is necessary to maintain and repair existing storm drainage systems and minimize natural stream erosion. ...
- What is the Surface Water Drainage Utility System?.
- The McKinney City Council voted March 5, 2002 to approve the "Surface Water Drainage Utility System," a plan to fund drainage maintenance and improvements for the City's efforts to help prevent future flooding of and standing water in creeks, drainageways and culverts. ...
- Drainage improvements that can be funded under the new Surface Water Drainage Utility System would include: .
- Construction of drainage facilities. ...
- Initially, funding will be concentrated on maintenance of creeks and ditches to keep the drainage system flowing freely. ...
- A well maintained drainage system prevents flooding, but can also positively affect the quality of the evironment in another way. ...
- Each house, apartment and duplex, regardless of size, will be charged an additional $1 per month for the Storm Water Drainage Utility System. ...
- 27 a month to the Surface Water Drainage Utility Syste.
- Implemenation of the Surface Water Drainage Utility System will also help position McKinney ahead of federal mandates. ... Environmental Protection Agency, require cities with populations over 50,000 (like McKinney) to develop a plan to improve water quality in lakes and streams by addressing drainage and water runoff. ...
24. Department of Geological & Atmospheric Sciences - Glossary -- Dendritic Drainage
- www.ge-at.iastate.edu
- Home Academics Alumni Courses Geol_100 old_files Glossary -- Dendritic Drainage Events/Info Gallery Links News People Research Field Camp .
- Glossary -- Dendritic Drainage.
- Dendritic Drainage.
- A drainage basin (called a catchment in Great Britain) is the entire area from which a main stream and its tributaries receive their water. ... Collectively, the streams in the drainage basin define a network that is separated from adjacent networks by a drainage divide that defines the perimeter of the network as a whole. Therefore, just as streams and their tributaries form networks with several levels of complexity, drainage basins are "nested" to form complex regions. ...
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