Flood is one of the various natural phenomena that cause losses that are not small, in addition caused by natural factors also due to the product of interference from human behavior itself. Therefore, in the effort to overcome the danger of flooding need to be reviewed by various related parties in an integrated manner, because the flood in an area is also influenced by the circumstances surrounding the Sungai Krueng Peusangan stretching from the beginning of the Peusangan River Estuary, Tingkeum Subdistrict, and to Bener meriah district. The good condition of Krueng peusangan watershed will greatly affect the water supply that flows in the peat river. the community is deeply disturbing the watershed condition is getting worse. As a result of general abrasion, the shelter is reduced due to fluvial sedimentation on the bottom of the river causing the container to be small, so that the floodwater eventually melimpas. There are also floods caused by the growing debit, without any sedimentation will still occur flooding. The existence of surface runoff (ground run off) also helped erode the soil that allows the occurrence of sedimentation. The more soil erosion, especially in the upstream area, the more sedimentation will occur in the downstream area, resulting in reduced capacity of the river cross section itself. Thus, if there is rain with moderate intensity then there will likely be flooding. Floods can also occur due to collapse of river embankment that can hit villages and rice fields of residents let alone close to the watershed area. This can disrupt the flood-stricken population both in terms of safety and economic terms.
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Rainfall throughout the year is always changing 7 depending on the season, it affects the amount of water flowing in the river. Then this condition will complicate the discharge arrangement for the purposes of navigation, irrigation, hydro power and other 7. So for the river 7 river fluctuation of large river flow that is the ratio of maximum and minimum discharge is large enough, then the river flow should be arranged. Arrangements are made by building large dams, so that water is accommodated in an annual reservoir while the river flow through the outlet structure can be set throughout the year. Hence the need to install hydrograph discharge equipment on the river next to the downstream (downstream) reservoir.
River that decreases its function as a water channel needs to be improved both on the river and river basin. several ways to improve the river environment are to build or rehabilitate bengunan - buildings such as;
1. Make / Fix the embankment that is around the river so that the river does not experience erosion / landslide that can cause damage to the environment and the river itself.
2. Retrograde (retetments) are buildings placed on the surface of a user's seat protecting a cliff and river or the surface of the embankment slope and overall contributing to the stability of the river channel or the body of the embankment it protects. There has been a very advanced development of the construction, one of the most vital ranch buildings and it is now possible to choose one of the most appropriate construction, materials and execution methods adapted to local conditions. Nevertheless slope reinforcement construction is continuously developed and refined
which is experiencing abrasion / erosion this is because there are several factors, including:
1. Solid objects, in the form of waste "solid waste from paper, plastic, and other materials.
2. Household waste. waste waste (both solid and liquid) such as - food wrap, soapy water.
3. laundry water containing chemicals, and so on: industrial waste. pollutant waste derived from industrial activity. As we know, the country is filled with hundreds of thousands of waste-producing industries. Factories that operate in many places often do not pay attention to the health of the surrounding environment. The rest of the chemical-laden production is the pollutant of river water number one, in addition to other types of solid wastes are very diverse.
4. Agricultural waste. the use of chemicals in agricultural activities is the main source that can pollute the waters although not as bad as what is produced by industrial waste.
5. As a result of Annual Flood and excessive mining of minerals% mining, water transportation activities in the trough or in the area of ββthe river benefits, which in the alu river will disrupt.