Urbanization effects on the river systems in the bucharest city region (romania)

Figures & data

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Table 1. Main morphometric features of the rivers crossing the Bucharest City region

No	River	Lt (km)	LB (km)^1†	As (m a.s.l.)	Am (m)	S (m/km)	A (km^2)
1	Argeş	350	–	2,140	12	6	12,550
2	Dâmboviţa	286	24.2	1,800	27	6	2,824
3	Sabar	174	–	349	37	2	1,346
4	Colentina	101	29.4	179	52	1	643

Note

L_t, total length; L_B, length in the Bucharest city area; As, headwaters elevation; Am, river mouth elevation; S, slope gradient; A, catchment area (data source: Aquaproiect 1992; †based on the measurements made on Google Satellite Layer).

Table 2. Main hydrological features of the rivers crossing the Bucharest City region

No	River	Gauging station	Period	Q (m^3/s)	q (l·s^−1·km^−2)	W (mil. m^3)
1	Argeş	Malu Spart A = 3,799 km^2 H = 751 m a.s.l.	1954–2006	39.4	10.4	1,240.3
2		Budeşti A = 9,328 km^2 H = 389 m a.s.l.	1950–2006	47.5	5.1	1,499.1
3	Dâmboviţa	Lunguleţu A = 1,105 km^2 H = 894 m a.s.l.	1988–2006	10.6	9.6	334.5
4		Budeşti A = 2,824 km^2 H = 399 m a.s.l.	1961–2005	22.3	12.4	703.8
5	Sabar	Vidra A = 1,144 km^2 H = 191 m a.s.l.	1958–2005	8.2	6.8	258.8
6	Colentina	Colacu A = 35 km^2 H = 162 m a.s.l.	(2006–2012)	1.46	3.2	15.1

Note

A, catchment area corresponding to the gauging station; H, catchment average elevation corresponding to the gauging station; Q, recorded average annual discharge; q, average annual specific discharge; W, average annual volume (data source: National Administration Romanian Waters, Argeş‐Vedea Water Branch).

Table 3. The data and documents used and their characteristics

No.	Type of data	Characteristics	Source
1	Cartographic documents	Military Survey maps (1/20,000; year 1900)	Crăciunescu et al. (2011)
		Topographic maps (1/25,000; year 1980)	Topographic Military Service
		Google Satellite Layer	Open Layer QGIS
2	Hydrological data sets	The average monthly and annual discharges at six gauging stations for the periods mentioned in Table 2	NARW‐AVWB
3	Water quality data	Water quality classes according to the biological and physicochemical parameters measured in 12 monitoring sections on Dâmboviţa, Colentina, Argeş, and Sabar rivers in 2013	NARW‐AVWB

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short-legendFigure 4.

Source: a—https://commons.wikimedia.org/wiki/File:Bucure%C8%99ti_Podul_Izvor.jpg; b—http://www1.pmb.ro/pmb/bucuresti/poze_meniu_en/poze_vechi1.html; c and d—Zaharia.

short-legendFigure 5.

Source: a—https://sites.google.com/site/municipiulb/artifact; b—http://www.panoramio.com/photo/75824601.

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short-legendFigure 8.

Source: a—http://www.activenews.ro/uploads/2014/10/15.jpg; b—http://www.activenews.ro/uploads/2014/10/14.jpg; c and d—Zaharia).

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Table 4. Trends in the variability of monthly and annual average discharges of the Argeş and Sabar rivers, in natural and modified flow regimes

Table 5. Biological, physicochemical, and ecological states of the main rivers crossing Bucharest City region in 2013

No	River/Section	Biological state				Physicochemical state							Global ecological state
		PP	PB	MZ	BS	TRA	OR	NUT	SAL	NSTP	ORCI	PCS
1	Argeş/Căteasca	II	–	II	II	I	I	II	I	I	II	II	II
2	Argeş/Crivina	II	–	II	II	I	I	II	I	I	II	II	II
3	Argeş/Budeşti	II	–	III	III	I	II	I	I	I	II	II	III
4	Argeş/Clăteşti	IV	–	IV	IV	I	III	IV	II	I	II	IV	IV
5	Dâmboviţa/Brezoaele	II	–	IV	IV	I	I	I	I	I	III	III	IV
6	Dâmboviţa/Arcuda	II	–	III	III	I	II	I	I	I	II	II	III
7	Dâmboviţa/Bălăceanca	III	–	V	V	I	V	V	II	II	V	V	V
8	Dâmboviţa/Budeşti	III	–	III	III	I	V	V	II	III	V	V	V
9	Colentina/Colacu	II	–	IV	IV	I	II	I	I	I	III	III	IV
10	Sabar/Tântava	II	–	II	II	I	II	I	II	I	II	II	II
11	Sabar/Vârteju	II	–	II	II	I	II	II	II	I	II	II	II
12	Sabar/Vidra	II	–	II	II	I	II	II	I	I	II	II	II

Note

PP, phytoplankton; PB, phytobenthos; MZ, macrozoobenthos; BS, biological state; TRA, thermal regime and acidification; OR, oxygen regime; NUT, nutrients regime; SAL, salinity/mineralization; NSTP, natural‐specific toxic pollutants; ORCI, other relevant chemical indicators (phenols, detergents, and AOX); PCS, physicochemical state; I–V, quality classes (data source: NARW).

short-legendFigure 14.

Aquaproiect. 1992. Atlasul Cadastrului Apelor din România. Ministerul Mediului, Bucureşti, Romania.

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Crăciunescu, V., I. Rus, Ş. Constantinescu, I. Ovejanu, and Z. Bartos‐elekes. 2011. Planurile directoare de tragere. http://www.geo-spatial.org/download/planurile-directoare-de-tragere

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NARW [National Administration Romanian Waters]. 2015a. Watershed flood defense plan, Argeş‐Vedea Water Branch [in Romanian]. http://www.rowater.ro/daarges/Continut%20Site/Planuri%20de%20aparare/Planuri%20bazinale.aspx

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Gherasim, C. C. 2005. Bucureştiul reflectat în documente cartografice. Dissertation. Universitatea din Bucureşti, Bucureşti, Romania.

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