Features of operation of drainage systems in the area of drainage in modern conditions (on an example of the Western region of Volyn obl.)

Abstract

Goal. To analyze the peculiarities of drainage systems in Western Polissia of Ukraine; to formulate on the basis of the analysis of the research the main activities in order to improve the efficiency of inter-farm and on-farm systems in humid zone. Methods. Economical-statistical, formalized reflection. Results. Growth is fixed in government funding and contracts for the reconstruction and repair of the network irrigation and drainage systems in the Volyn obl. (Ratniv Interdistrict management of water economy) for the period 2010–2018. The majority of the funding (85%) was focused on the maintenance and operation of systems. 15% of all funds were allocated for capital repairs. Due to the perfect operation of drainage systems of on-farm and inter-farm value during 2018–2019 only for certain low areas of the Pripyat river the level of water raised on 0.3–0.4 m above the zero position. At the same time, the excess of marks of flooding of riverine settlements was 0.1–0.2 m and did not harm agricultural land. Periods of removal of excess water was 0.5–2 days. For comparison, the period of snowmelt and spring rains of 2009 was characterized by significant rise of groundwater level, the water level in the Pripyat river raised above 1.2 m, the removal of excess water from flooded areas lasted about 1 month. Conclusions. A positive example of maintenance of drainage network in the Volyn obl., the interaction of land and operational services, qualified repair and maintenance is the key to the sustainable functioning of drainage systems and effective use of reclaimed agricultural lands, protection of settlements from the harmful effects of water.