Abstract
The paper analyzes changes in the hydro-physical properties of peat micro- and macrosystems in the process of drainage. Maximum moisture-holding capacity of peat is used as the main characteristic. With a full drying cycle and subsequent moistening of peat, there are three stages associated with the coagulative structure formation in the system. The boundary of the transition from the state «peat in water» to the state «water in peat» is moisture content equal to one. It divides the period of structure formation into two periods, due to the predominating action of van der Waals interactions or hydrogen bonds. In the state «water in pear» the peat system loses the ability to recover its original hydro-physical properties. Scaling up the research results on peat deposits (marshes) makes it possible to classify them according to the degree of drainage of the deposit. A new approach to the use of the term «surface water body» for peat deposits is proposed.
Highlights
An analysis of the information on hydrological features of peatlands is needed for their effective drainage
The value characterizing the ability of peat systems to absorb and retain moisture is an indicator of the total moisture capacity W FW
The graphs show a certain zone, until which the system almost completely restores its water-physical properties
Summary
An analysis of the information on hydrological features of peatlands is needed for their effective drainage Such features are determined by geomorphology, the nature of water supply, types of vegetation, as well as conditions of internal and external moisture exchange in the deposits. The upper limit at which water is mechanically retained by peat is the relative humidity of 8990%. These values, the moisture in the peatland is classified as free (not associated with the organic matter of peat). The boundary conditions may vary up or down in the medium range from 2 to 6% They are determined by the characteristics of the peat forming the deposit
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