Morphological variations in subsidence basin and importance for land use planning: undermined Karvina region (Czech Republic)

Článek je přístupný po bezplatné registraci na webu vydavatele.The study area has been greatly affected by mining activities and other anthropogenic activities since it falls within the so-called Ostrava-Karvina Coal District. Morphological variations in time by temporal variations in subsidence basins by underground mining activities in the Moravia-Silesian Region in the north-east of the Czech Republic was investigated in this article. Subsidence was observed in the four time intervals of 1983-1990, 1983-1995, 1983-2000, and 1983-2005. Relationships between estimated subsidence during time period of 2003-2010 and municipality land use plans were identified by overlay analyses. There is a clear impact on the land use plans caused by varying thoroughness of the urban planners. As the result of the observations in these periods, underground mining activities considerably had a negative impact on the current built-up area. Despite this, the built-up area erected on the most affected subsidence interval of “500-1200 cm” during the last time period of 1983-2005 is only 1%. According to the Land Use Plan Categorization, development planned for the most impacted subsidence interval of “500-1200 cm” is in the U_V_0 category of Unspecified Production Zone and also in the U_DL_2 zone of mining interest. This development area covers 1.54% of the overall planned development. Analyses related with slope deformation in the study area imply that there are three active areal shaped slide areas, one so-called other areal shaped slide area (55.6 ha) and three active very small slide areas. A possible risk is posed by the active areal shaped slide areas which have an overall surface area of 12.05 ha. As the main results of this study; it was found that the subsidence distribution implies trends which confirm that the area unaffected by subsidence impacts decreased over time due to the expansion of the subsidence basin, and thus a re-distribution of impacts occurred in the study area. These impacts were caused by black coal mining in the Karvina Mine, the CSA Plant and in allotments of Karvina-Doly I, Doubrava and Darkov. As another result; the analyses showed that impacts of subsidence in the area had not properly considered in the planning of future development.Web of Science9219718