World Species : Protected Area : Pyasachnik Reservoir

Pyasachnik Reservoir

Location:	Bulgaria
Area:	7,855 acres (3,179 hectares)
Species:	All Endangered Invasive
Climate:	View Climate Data
Land Use:	View Land Use Data
Köppen climate classification:	Cfa (Climate: warm temperate; Precipitation: fully humid; Temperature: hot summer)
Natura 2000 Data Sheet:	View Data Sheet Explanatory notes

Ecoregions

Balkan mixed forests

Soils

— Protected Area Boundary

	A					B				C

Share	55 %	20 %	10 %	10 %	5 %	40 %	30 %	25 %	5 %	50 %	20 %	10 %	10 %	5 %	5 %
Soil Type	Vertic Luvisols	Eutric Regosols	Chromic Luvisols	Eutric Vertisols	Eutric Planosols	Eutric Planosols	Dystric Planosols	Chromic Luvisols	Eutric Regosols	Chromic Luvisols	Chromic Luvisols	Umbric Leptosols	Lithic Leptosols	Eutric Regosols	Eutric Cambisols
Topsoil Texture	Fine	Medium	Medium	Fine	Medium	Medium	Medium	Medium	Medium	Medium	Medium	Medium	Medium	Medium	Medium
Reference Depth	100 cm	100 cm	100 cm	100 cm	100 cm	100 cm	100 cm	100 cm	100 cm	100 cm	100 cm	30 cm	10 cm	100 cm	100 cm
Drainage	Moderately well	Moderately well	Moderately well	Poor	Poor	Poor	Poor	Moderately well	Moderately well	Moderately well	Moderately well	Imperfectly	Imperfectly	Moderately well	Moderately well
Available Water Capacity	150 m	150 m	150 m	125 m	150 m	150 m	150 m	150 m	150 m	100 m	100 m	15 mm	15 mm	100 m	100 m
Phase 1										Stony	Stony	Stony	Stony	Stony	Stony
Root Obstacle	None to 80 cm	None to 80 cm	None to 80 cm	None to 80 cm	None to 80 cm	None to 80 cm	None to 80 cm	None to 80 cm	None to 80 cm	20 - 40 cm	20 - 40 cm			None to 80 cm	None to 80 cm
Impermeable Layer	None to 150 cm	None to 150 cm	None to 150 cm	None to 150 cm	None to 150 cm	None to 150 cm	None to 150 cm	None to 150 cm	None to 150 cm	None to 150 cm	None to 150 cm			None to 150 cm	None to 150 cm
Soil Water Regime	Not wet within 80 cm for over 3 months, nor wet within 40 cm for over 1 month	Not wet within 80 cm for over 3 months, nor wet within 40 cm for over 1 month	Not wet within 80 cm for over 3 months, nor wet within 40 cm for over 1 month	Not wet within 80 cm for over 3 months, nor wet within 40 cm for over 1 month	Not wet within 80 cm for over 3 months, nor wet within 40 cm for over 1 month	Wet within 40 cm depth for over 11 month	Wet within 40 cm depth for over 11 month	Not wet within 80 cm for over 3 months, nor wet within 40 cm for over 1 month	Not wet within 80 cm for over 3 months, nor wet within 40 cm for over 1 month	Not wet within 80 cm for over 3 months, nor wet within 40 cm for over 1 month	Not wet within 80 cm for over 3 months, nor wet within 40 cm for over 1 month			Not wet within 80 cm for over 3 months, nor wet within 40 cm for over 1 month	Not wet within 80 cm for over 3 months, nor wet within 40 cm for over 1 month
Misc. Property	Vertic (cracks of more than 1 cm wide)			Vertic (cracks of more than 1 cm wide)
Topsoil Properties
Gravel	4 %	25 %	12 %	4 %	4 %	4 %	4 %	12 %	25 %	12 %	12 %	6 %	21 %	25 %	9 %
Sand	18 %	47 %	48 %	19 %	42 %	42 %	42 %	48 %	47 %	48 %	48 %	49 %	42 %	47 %	42 %
Silt	26 %	34 %	28 %	25 %	38 %	38 %	38 %	28 %	34 %	28 %	28 %	31 %	34 %	34 %	36 %
Clay	56 %	19 %	24 %	56 %	20 %	20 %	20 %	24 %	19 %	24 %	24 %	20 %	24 %	19 %	22 %
USDA Texture	Clay	Loam	Loam	Clay	Loam	Loam	Loam	Loam	Loam	Loam	Loam	Loam	Loam	Loam	Loam
Reference Bulk Density	1.21 g/cm³	1.43 g/cm³	1.4 g/cm³	1.22 g/cm³	1.41 g/cm³	1.41 g/cm³	1.41 g/cm³	1.4 g/cm³	1.43 g/cm³	1.4 g/cm³	1.4 g/cm³	1.43 g/cm³	1.38 g/cm³	1.43 g/cm³	1.4 g/cm³
Bulk Density	1.35 g/cm³	1.21 g/cm³	1.53 g/cm³	1.56 g/cm³	1.47 g/cm³	1.47 g/cm³	1.38 g/cm³	1.53 g/cm³	1.21 g/cm³	1.53 g/cm³	1.53 g/cm³	1.1 g/cm³	1.3 g/cm³	1.21 g/cm³	1.37 g/cm³
Organic Carbon	1.25 %	0.98 %	0.83 %	1.05 %	1.06 %	1.06 %	1.14 %	0.83 %	0.98 %	0.83 %	0.83 %	2.4 %	1.61 %	0.98 %	1 %
PH	6.9	6.4	6.3	6.9	5.6	5.6	4.5	6.3	6.4	6.3	6.3	5.1	7.5	6.4	6.6
Clay Cation Exchange Capacity	45 cmol kg⁻¹	40 cmol kg⁻¹	39 cmol kg⁻¹	70 cmol kg⁻¹	37 cmol kg⁻¹	37 cmol kg⁻¹	25 cmol kg⁻¹	39 cmol kg⁻¹	40 cmol kg⁻¹	39 cmol kg⁻¹	39 cmol kg⁻¹	34 cmol kg⁻¹	42 cmol kg⁻¹	40 cmol kg⁻¹	55 cmol kg⁻¹
Soil Cation Exchange Capacity	29 cmol kg⁻¹	12 cmol kg⁻¹	12 cmol kg⁻¹	43 cmol kg⁻¹	11 cmol kg⁻¹	11 cmol kg⁻¹	7 cmol kg⁻¹	12 cmol kg⁻¹	12 cmol kg⁻¹	12 cmol kg⁻¹	12 cmol kg⁻¹	12 cmol kg⁻¹	16 cmol kg⁻¹	12 cmol kg⁻¹	16 cmol kg⁻¹
Base Saturation	96 %	78 %	88 %	100 %	67 %	67 %	40 %	88 %	78 %	88 %	88 %	36 %	100 %	78 %	93 %
Total Exchangeable Bases	25.9 cmol kg⁻¹	14 cmol kg⁻¹	10 cmol kg⁻¹	40.9 cmol kg⁻¹	8.4 cmol kg⁻¹	8.4 cmol kg⁻¹	2.2 cmol kg⁻¹	10 cmol kg⁻¹	14 cmol kg⁻¹	10 cmol kg⁻¹	10 cmol kg⁻¹	4.7 cmol kg⁻¹	15.5 cmol kg⁻¹	14 cmol kg⁻¹	14 cmol kg⁻¹
Calcium Carbonate	1.6 %	0 %	0 %	0.2 %	0 %	0 %	0 %	0 %	0 %	0 %	0 %	0 %	3.9 %	0 %	0 %
Calcium Sulphate	0 %	0 %	0 %	0 %	0 %	0 %	0 %	0 %	0 %	0 %	0 %	0 %	0 %	0 %	0 %
Exchangeable Sodium	1 %	1 %	1 %	1 %	3 %	3 %	2 %	1 %	1 %	1 %	1 %	4 %	3 %	1 %	2 %
Electrical Conductivity	0.1 dS m-1	0.1 dS m-1	0.1 dS m-1	0.1 dS m-1	0.1 dS m-1	0.1 dS m-1	0.1 dS m-1	0.1 dS m-1	0.1 dS m-1	0.1 dS m-1	0.1 dS m-1	0.1 dS m-1	0.1 dS m-1	0.1 dS m-1	0.1 dS m-1
Subsoil Properties
Gravel	8 %	28 %	8 %	5 %	4 %	4 %	4 %	8 %	28 %	8 %	8 %			28 %	12 %
Sand	18 %	51 %	41 %	18 %	33 %	33 %	28 %	41 %	51 %	41 %	41 %			51 %	41 %
Silt	21 %	31 %	25 %	24 %	31 %	31 %	29 %	25 %	31 %	25 %	25 %			31 %	34 %
Clay	61 %	18 %	34 %	58 %	36 %	36 %	43 %	34 %	18 %	34 %	34 %			18 %	25 %
USDA Texture	Clay (heavy)	Loam	Clay loam	Clay	Clay loam	Clay loam	Clay	Clay loam	Loam	Clay loam	Clay loam			Loam	Loam
Reference Bulk Density	1.2 g/cm³	1.44 g/cm³	1.33 g/cm³	1.21 g/cm³	1.3 g/cm³	1.3 g/cm³	1.27 g/cm³	1.33 g/cm³	1.44 g/cm³	1.33 g/cm³	1.33 g/cm³			1.44 g/cm³	1.38 g/cm³
Bulk Density	1.32 g/cm³	1.45 g/cm³	1.51 g/cm³	1.6 g/cm³	1.4 g/cm³	1.4 g/cm³	1.41 g/cm³	1.51 g/cm³	1.45 g/cm³	1.51 g/cm³	1.51 g/cm³			1.45 g/cm³	1.39 g/cm³
Organic Carbon	0.66 %	0.4 %	0.4 %	0.59 %	0.43 %	0.43 %	0.37 %	0.4 %	0.4 %	0.4 %	0.4 %			0.4 %	0.37 %
PH	7.2	6.9	6.4	7.5	6.3	6.3	4.8	6.4	6.9	6.4	6.4			6.9	7
Clay Cation Exchange Capacity	51 cmol kg⁻¹	56 cmol kg⁻¹	41 cmol kg⁻¹	70 cmol kg⁻¹	47 cmol kg⁻¹	47 cmol kg⁻¹	26 cmol kg⁻¹	41 cmol kg⁻¹	56 cmol kg⁻¹	41 cmol kg⁻¹	41 cmol kg⁻¹			56 cmol kg⁻¹	55 cmol kg⁻¹
Soil Cation Exchange Capacity	30 cmol kg⁻¹	11 cmol kg⁻¹	15 cmol kg⁻¹	42 cmol kg⁻¹	17 cmol kg⁻¹	17 cmol kg⁻¹	10 cmol kg⁻¹	15 cmol kg⁻¹	11 cmol kg⁻¹	15 cmol kg⁻¹	15 cmol kg⁻¹			11 cmol kg⁻¹	15 cmol kg⁻¹
Base Saturation	97 %	89 %	90 %	100 %	89 %	89 %	57 %	90 %	89 %	90 %	90 %			89 %	93 %
Total Exchangeable Bases	26.6 cmol kg⁻¹	10.3 cmol kg⁻¹	12 cmol kg⁻¹	44.2 cmol kg⁻¹	15.2 cmol kg⁻¹	15.2 cmol kg⁻¹	11.4 cmol kg⁻¹	12 cmol kg⁻¹	10.3 cmol kg⁻¹	12 cmol kg⁻¹	12 cmol kg⁻¹			10.3 cmol kg⁻¹	15.1 cmol kg⁻¹
Calcium Carbonate	4.7 %	0 %	0 %	0.8 %	0 %	0 %	0 %	0 %	0 %	0 %	0 %			0 %	0.1 %
Calcium Sulphate	0 %	0 %	0 %	0 %	0 %	0 %	0 %	0 %	0 %	0 %	0 %			0 %	0 %
Exchangeable Sodium	1 %	2 %	1 %	2 %	4 %	4 %	7 %	1 %	2 %	1 %	1 %			2 %	2 %
Electrical Conductivity	0.1 dS m-1	0.1 dS m-1	0.1 dS m-1	0.1 dS m-1	0.1 dS m-1	0.1 dS m-1	0.1 dS m-1	0.1 dS m-1	0.1 dS m-1	0.1 dS m-1	0.1 dS m-1			0.1 dS m-1	0.1 dS m-1

Soil data provided by FAO/IIASA/ISRIC/ISSCAS/JRC, 2012. Harmonized World Soil Database (version 1.2). FAO, Rome, Italy and IIASA, Laxenburg, Austria.

Köppen climate classification provided by Kottek, M., J. Grieser, C. Beck, B. Rudolf, and F. Rubel, 2006: World Map of Köppen-Geiger Climate Classification updated. Meteorol. Z., 15, 259-263