Специфични особености при инженерногеоложките и хидрогеоложки проучвания за изграждане на гробищни паркове в страната: пример за района на Велинград

Abstract

The main purpose of this investigation is to clarify the engineering and hydrogeological conditions in the Chepinska valley area in connection with the extension of the graveyard park of the town of Velingrad. During the designing of new cemeteries, it is necessary to take into account the engineering and hydrogeological conditions of the area in which they will be located. Ignoring these conditions may lead to adverse effects on the environment including groundwater quality. Because of the nature of the location, in the alluvial deposits of the Chepinska and Malka Matnitsa rivers and their tributaries and the requirements of Ordinance No. 2 of 21 April 2011 "on the health requirements for cemetery parks and the burial and transfer of the deceased" (SG 36 of 10 May 2011), the groundwater level shall be at least 0.5 m deeper below burial sites. In line with these requirements, special attention should be paid to the type of sediments in unsaturated zone, their permeability, depth to the groundwater level and groundwater quality. The main indicator for determining the impact of cemetery parks on groundwater is the content of manganese ions. In order to achieve the set goals, four boreholes and three exploratory pits have been constructed. Experimental water abstraction and six infiltration tests in unsaturated zone were carried out as well as a test for the chemical composition of groundwater and a grain size analysis of seven soil samples.