The Study on Integrated Water Management Final Report - Main Report in the Republic of 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 ( sub-region)

Silistrenski podrajon ( sub-region)

Dobrichki podrajon ( 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 ()

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, (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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