DBPapers
DOI: 10.5593/SGEM2014/B12/S2.033

DATA ANALYSIS FROM THE MONITORING OBSERVATIONS OF GROUNDWATER LEVELS IN THE SARMATIAN AQUIFER IN NORTHEASTERN BULGARIA

V. Pavlova, A. Benderev
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-08-7 / ISSN 1314-2704, June 19-25, 2014, Book 1, Vol. 2, 251-258 pp

ABSTRACT
Sarmatian aquifer in northeastern Bulgaria is an important source of water supply for the settlements in this part of the country- Dobrudzha region. To interpret the mode of groundwater it is established a monitoring network comprising of more than 20 drilling wells with different periods and frequency of observation, as the most thorough and complete data is collected for the past few years. Geomorphological and hydrogeological conditions cause water levels to be at various depths - from 1-2 m to more than 70 m. Temporal water level changes differ among the numerous monitoring points. Amplitudes of their changes are in the range of from 1 m to about 9 m, as well as depending on the thickness of the unsaturated zone and as by changes of the groundwater recharge conditions. In most of the wells in recent years (since 2003) there is a trend of increasing of the water level. It mainly refers to areas in southern and central parts of the distribution of the aquifer, where are revealed most of the outcrop areas of the Sarmatian limestones. Water level fluctuations around a constant value are observed in monitoring stations located near the Black sea line, some coastal lakes and wet zones. Changes of water levels in some of the northern part wells differ in character from the rest wells, where the periods of observation were relatively the shortest. The results are a step ahead in clarifying the influence of various natural and anthropogenic factors on the quality and quantity of groundwaters in the Sarmatian aquifer in northeastern Bulgaria.

Keywords: groundwater, regime, sarmatian aquifer, Dobrudzha