Matches in SemOpenAlex for { <https://semopenalex.org/work/W4229885061> ?p ?o ?g. }
Showing items 1 to 72 of
72
with 100 items per page.
- W4229885061 abstract "Abstract. Contamination of groundwater resources by nitrate leaching under agricultural land is probably the most troublesome agriculture-related water contamination worldwide. Deep soil sampling (10 m) was used to calibrate vertical flow and nitrogen-transport numerical models of the unsaturated zone under different agricultural land uses. Vegetable fields (potato and strawberry) and deciduous orchards (persimmon) in the Sharon area overlying the coastal aquifer of Israel were examined. Average nitrate-nitrogen fluxes below vegetable fields were 210–290 kg ha−1 yr−1, and under deciduous orchards, 110–140 kg ha−1 yr−1. The output water and nitrate-nitrogen fluxes of the unsaturated zone models were used as input data for a three-dimensional flow and nitrate-transport model in the aquifer under an area of 13.3 km2 of agricultural land. The area was subdivided into four agricultural land uses: vegetables, deciduous orchards, citrus orchards and non-cultivated. Fluxes of water and nitrate-nitrogen below citrus orchards were taken from a previous study in the area. The groundwater flow model was calibrated to well heads by changing the hydraulic conductivity. The nitrate-transport model, which was fed by the abovementioned models of the unsaturated zone, succeeded in reconstructing the average nitrate concentration in the wells. However, this transport model failed in calculating the high concentrations in the most contaminated wells and the large spatial variability of nitrate concentrations in the aquifer. To reconstruct the spatial variability and enable predictions, nitrate fluxes from the unsaturated zone were multiplied by local multipliers. This action was rationalized by the fact that the high concentrations in some wells cannot be explained by regular agricultural activity, and are probably due to malfunctions in the well area. Prediction of the nitrate concentration 40 years in the future with three nitrogen-fertilization scenarios showed that: (i) under the business as usual fertilization scenario, the nitrate concentration (as NO3−) will increase on average by 19 mg L−1; (ii) under a scenario of 25 % reduction of nitrogen fertilization, the nitrate concentration in the aquifer will stabilize; (iii) with a 50 % reduction of nitrogen fertilization, the nitrate concentration will decrease on average by 18 mg L−1." @default.
- W4229885061 created "2022-05-11" @default.
- W4229885061 creator A5030472793 @default.
- W4229885061 creator A5033577951 @default.
- W4229885061 creator A5035478934 @default.
- W4229885061 creator A5079320908 @default.
- W4229885061 date "2017-02-20" @default.
- W4229885061 modified "2023-09-27" @default.
- W4229885061 title "Modeling nitrate from land-surface to wells' perforations under agricultural land: success, failure, and future scenarios in a Mediterranean case study" @default.
- W4229885061 doi "https://doi.org/10.5194/hess-2017-55" @default.
- W4229885061 hasPublicationYear "2017" @default.
- W4229885061 type Work @default.
- W4229885061 citedByCount "0" @default.
- W4229885061 crossrefType "posted-content" @default.
- W4229885061 hasAuthorship W4229885061A5030472793 @default.
- W4229885061 hasAuthorship W4229885061A5033577951 @default.
- W4229885061 hasAuthorship W4229885061A5035478934 @default.
- W4229885061 hasAuthorship W4229885061A5079320908 @default.
- W4229885061 hasBestOaLocation W42298850612 @default.
- W4229885061 hasConcept C118518473 @default.
- W4229885061 hasConcept C127313418 @default.
- W4229885061 hasConcept C131227075 @default.
- W4229885061 hasConcept C159390177 @default.
- W4229885061 hasConcept C159750122 @default.
- W4229885061 hasConcept C187320778 @default.
- W4229885061 hasConcept C18903297 @default.
- W4229885061 hasConcept C191440113 @default.
- W4229885061 hasConcept C2776384668 @default.
- W4229885061 hasConcept C35588792 @default.
- W4229885061 hasConcept C39432304 @default.
- W4229885061 hasConcept C502990516 @default.
- W4229885061 hasConcept C63184880 @default.
- W4229885061 hasConcept C75622301 @default.
- W4229885061 hasConcept C76177295 @default.
- W4229885061 hasConcept C76886044 @default.
- W4229885061 hasConcept C86803240 @default.
- W4229885061 hasConcept C90982505 @default.
- W4229885061 hasConceptScore W4229885061C118518473 @default.
- W4229885061 hasConceptScore W4229885061C127313418 @default.
- W4229885061 hasConceptScore W4229885061C131227075 @default.
- W4229885061 hasConceptScore W4229885061C159390177 @default.
- W4229885061 hasConceptScore W4229885061C159750122 @default.
- W4229885061 hasConceptScore W4229885061C187320778 @default.
- W4229885061 hasConceptScore W4229885061C18903297 @default.
- W4229885061 hasConceptScore W4229885061C191440113 @default.
- W4229885061 hasConceptScore W4229885061C2776384668 @default.
- W4229885061 hasConceptScore W4229885061C35588792 @default.
- W4229885061 hasConceptScore W4229885061C39432304 @default.
- W4229885061 hasConceptScore W4229885061C502990516 @default.
- W4229885061 hasConceptScore W4229885061C63184880 @default.
- W4229885061 hasConceptScore W4229885061C75622301 @default.
- W4229885061 hasConceptScore W4229885061C76177295 @default.
- W4229885061 hasConceptScore W4229885061C76886044 @default.
- W4229885061 hasConceptScore W4229885061C86803240 @default.
- W4229885061 hasConceptScore W4229885061C90982505 @default.
- W4229885061 hasLocation W42298850611 @default.
- W4229885061 hasLocation W42298850612 @default.
- W4229885061 hasOpenAccess W4229885061 @default.
- W4229885061 hasPrimaryLocation W42298850611 @default.
- W4229885061 hasRelatedWork W10553335 @default.
- W4229885061 hasRelatedWork W23120614 @default.
- W4229885061 hasRelatedWork W27030639 @default.
- W4229885061 hasRelatedWork W5122512 @default.
- W4229885061 hasRelatedWork W54233581 @default.
- W4229885061 hasRelatedWork W57026777 @default.
- W4229885061 hasRelatedWork W57048102 @default.
- W4229885061 hasRelatedWork W5717700 @default.
- W4229885061 hasRelatedWork W9066667 @default.
- W4229885061 hasRelatedWork W19757457 @default.
- W4229885061 isParatext "false" @default.
- W4229885061 isRetracted "false" @default.
- W4229885061 workType "article" @default.