000			01547nab a22002897a 4500
001			G91035
003			MX-TxCIM
005			20190702221458.0
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040			_aMX-TxCIM
100	1		_aWakida, F.T.
245	0	0	_aNon-agricultural sources of groundwater nitrate: _b a review and case study
260			_c2005
340			_aComputer File
520			_aNitrate is often seen as an agricultural pollutant of groundwater and so is expected to be at higher concentrations in the groundwaters surrounding a city than in those beneath it. However the difference between rural and urban nitrate concentrations is often small, due to the non-agricultural sources of nitrogen that are concentrated in cities. This paper illustrates the source and significance of non-agricultural nitrogen for groundwater and presents a case study of nitrate loading in the city of Nottingham. Major sources of nitrogen in urban aquifers are related to wastewater disposal (on-site systems and leaky sewers), solid waste disposal (landfills and waste tips). The major sources of nitrogen in the Nottingham area are mains leakage and contaminated land with approximately 38% each of a total load of 21 kg N ha-1 year-1.
546			_aEnglish
591			_aElsevier
650	1	0	_aContamination
650	1	0	_91140 _aGroundwater _gAGROVOC
650	1	0	_aLeakage
650	1	0	_aNitrate
650	1	0	_aNottingham
650	1	0	_aUrban
700	1		_aLerner, D.N., _ecoaut.
773	0		_tWater Research _gv. 39, no. 1, p. 3-16
942			_cJA _2ddc
999			_c27219 _d27219