The Study on Integrated Water Management Final Report - Main Report in the Republic of Bulgaria Chapter 2
Scale 1:2,000,000
2.5
Figure 2.5.1 Hydrogeological Regions in Bulgaria by MOEW
Within the Dolnodunavska artezianska oblast (Low-Danube artesian region):
SEVERO-BALGARSKI ARTEZIANSKI BASEJN (Northern Bulgarian artesian basin)
Lomski podrajon (Lom sub-region)
Svishtovski podrajon (Svishtov sub-region)
Silistrenski podrajon (Silistra sub-region)
Dobrichki podrajon (Dobrich sub-region)
Provadijski podrajon (Provadia sub-region)
Kamchijski podrajon (Kamchia sub-region)
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Figure 2.5.2 Distribution of Transmissivity
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Figure 2.5.3 NIMH Monitoring Wells
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Figure 2.5.4 NIMH Wellls with Pumping Station
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Figure 2.5.5 NIMH Monitored Springs
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Figure 2.5.6 Ground water Monitoring Station (ExEA)
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Figure 2.5.7 Areas with Extremely Shallow Ground water Level (GWL)
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DUMMY
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1-Jan-2000 1-Jan-2001 1-Jan-2002 1-Jan-2003 1-Jan-2004 1-Jan-2005 1-Jan-2006 50
100
150
200
depth to GWL, cm 250
300
350
Figure 2.5.8 Hydrograph of the GWL for the Station N 585 in the Low Reach of the Ogosta River
Figure 2.5.9 Hydrographs of GWL for Observational Wells: Natural and Under Irrigation
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1960 1966 1972 1978 1984 1990 1996 2002 15
20 high m average
25 low
depth to GWL, GWL, to depth 30
35
Figure 2.5.10 Groundwater Level Fluctuations for Observational Well 310 (Sliven)
12
8
4
amplitude of GWL, m
0
1960 1966 1972 1978 1984 1990 1996 2002
Figure 2.5.11 Amplitude of Groundwater Level Fluctuations for Observational Well 310 (Sliven)
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1800
1600
1400
1200
1000
800
600
400 *59 521226 Д1
200
1-Jan-2000 1-Jan-2001 1-Jan-2002 1-Jan-2003 1-Jan-2004 1-Jan-2005 1-Jan-2006 Figure 2.5.12 Discharge (in l/s) for Spring Jazo – Station N 59, Razlog (WABD)
250
200
150
100
50 *19 131402 Д1 *19P 131402 Д1 *600 161114 Д1 0
1-Jan-2000 1-Jan-2001 1-Jan-2002 1-Jan-2003 1-Jan-2004 1-Jan-2005 1-Jan-2006 Figure 2.5.13 Discharge (in l/s) for Spring Bela and Stojanovo (N 19 and 600), NW Bulgaria
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160 8000 140 7000
120 6000 on sums,
ti a 100 5000 it
p i mm 80 4000 60 3000 ay prec Discharge, l/s d - 40 2000 10 20 1000 0 0
1.1 3.2 4.1 5.1 1.16 1.31 2.15 3.17 4.16 5.16 5.31 6.15 6.30 7.15 7.30 8.14 8.29 9.13 9.28 10.13 10.28 11.12 11.27 12.12 12.27 Month and date
Figure 2.5.14 Daily Discharge of Kotlenski Springs during the Wettest Year (1966) and 10-day Precipitation Sums for Meteorological Station Kotel (Orehova & Benderev, 2004)
1000 Qav
800 1994 2001 600
400
Discharge, l/s 200
0 123456789101112
Figure 2.5.15 Monthly Distribution of Spring Flow for Dry Years (1994, 2001) compared with Long-term Characteristics
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GWL for well 1432
1980 1985 1990 1995 2000 2005 1600 mean 1800 min max 2000
GWL, cm 2200
2400
2600
Figure 2.5.16 Depth to the Groundwater Level of the Upper Jurassic – Lower Cretaceous Aquifer for NIMH Station N 1432 – Nevsha.
Yearly amplitude for well 1432
120
80
40 amplitude, cm
0
1980 1985 1990 1995 2000 2005
Figure 2.5.17 Yearly Amplitude of the Groundwater Level for NIMH Station N 1432 – Nevsha
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Figure 2.5.18 Groundwater Bodies at Risk by River Basin Directorates (Quantity Aspect)
Figure 2.5.19 Map of TDS Content in Groundwater in Bulgaria (T. Kehajov, 1972) Regions with TDS content: 1 – < 200 mg/l; 2 – from 200 to 400 mg/l; 3 – from 400 to 600 mg/l; 4 – from 600 to 800 mg/l; 5 – from 800 to 1000 mg/l; 6 – >1000 mg/l
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Figure 2.5.20 Zones with Prevailing Concentrations of Nitrate over 50 mg/l in Groundwater (Kehajov et al., 2002)
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