| 摘要 |
FIELD: measurement equipment.SUBSTANCE: protective facilities are installed. Previously the coastal area of the river is investigated, and unfavourable sections of the investigated areas are found. Then at the distance of not more than 2, 4 and 6 m from the water level line they install vertical calibrated surveying rods with a division price of not more than 1 cm. The readings of the soil level on the surveying rod are taken as the start of count of the washed soil level. Then during the year after heavy precipitation they measure height of washed soil at the base of surveying rods, and determine the average height hof the washed soil on each of three surveying rods. Then they determine the average value of the height of washed soil at all surveying rods, and if the value of his more than 3 cm, they predict intensive development of the water body eutrophication process. Protective facilities in the form of engineering structures, for instance, gabion structures, are installed. If his less than 3 cm, they predict development of the process of water body eutrophication, and biological recultivation is performed, for instance, sow grass with a root system creating a turf layer.EFFECT: reduction of water body areas subject to eutrophication. |
