design of spillway structures of peatland rewetting systems
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2014
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Abstract
In summer 2010 drought and heat weather cause numerous peat fires. During two months Moscow was shrouded in acid smoke. To prevent such situations government of Moscow region decided to rewet previously drained peatlands. Peatland rewetting systems can be divided into two types. The first type is watering system based on previously used drainage system. The main idea of this method is rising of groundwater levels with the help of special water retaining constructions installed in drainage canals. The design of water receivers allows keeping up water level in canals and draining excesses. There are two types of water receivers: dock-type water receiver and water receiver as a portal to the gate. The choice of one or another type of water receiver depends on the canal depth. If it is less than 1.5 m, we apply portal construction. At the depth of more than 1.5 m the mine water receiver is more suitable. The second way of watering previously drained peatlands is the creation of ponds, dams on streams and small rivers. Special discharge structures increase water level in the river upstream. In downstream water level rises due to the redistribution of the flow. As a result, the groundwater level rises and peat become watered. There are two types of spillway structures: with direct overflow wall and labyrinth overflow wall. Structure with direct overflow wall is applicable on small rivers. In narrow alignments with high consumptions it is better to use another type of weir. As output it is necessary to notice that all constructions used in peatlands watering were designed as simple and reliable as possible. It is so because unpredictable weather conditions can cause beyond the design flows so weirs must have necessary reserve of passing costs.
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petrovich2014stroitelstvo:design
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| Authors | ;Sainov Mihail Petrovich;Akulinin Anton Nikolaevich |
| Journal | pakistan journal of pharmaceutical sciences |
| Year | 2014 |
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