Известия Томского политехнического университета: Инжиниринг георесурсов (May 2019)
Relief morphostructure models method of building large-scale map of hydroisohypses
Abstract
The main aim of the research is to develop the hydro-morphostructural method of constructing large-scale depth-to-water maps of aquifer. This method allows developing the maps providing the limited background information on groundwater levels in wells. The paper introduces a new approach to map developing based on a deterministic model of controlling pressure field aquifers - the model of relief morphostructure. All existing methods and technologies apply probabilistic models of pressure distribution in mapping hydroisohyps. The paper introduces: statement of the research subject and the problem to be solved by the development technique; adopted content of basic concepts; brief description of hydrogeological conditions of the object; points of morphostructural-hydrogeological analysis; rules for implementing the provisions in the method of constructing large-scale predictive depth-to-water maps; depth-to-water map generated on the basis of relief morphological structure model for the area of groundwater mining enterprise and evaluation of its accuracy; comparative evaluations of two methods of mapping - the developed and adopted ones. The main difference of the methods is their modeling content, or foundation. The developed technique is based on a deterministic model of filtration flow structure dependence on relief morphostructure. The adopted technique is based on probabilistic models of pressure distribution at the observation points. In the development method the position of linear and areal elements of filtration flow structure which are prominent in the pressure field are given permanent in space and time by the model of relief morphostructure. In the adopted ones this position is uncertain. The requirements are different for the scope of the initial information satisfying some standards of accuracy. When constructing the map by the development method the precision in reflecting the filtration flow structure and spatial distribution of characteristics of its pressure field is determined by the finite and small number of wells. To obtain the same accuracy of the maps with construction according to the accepted procedures one requires greater amount of initial information.
