Publication
Water pollution induced by rainfed and irrigated agriculture in Medirerranean environment, at basin scale
| dc.contributor.author | Duarte, A.C. | |
| dc.date.accessioned | 2024-02-16T15:34:40Z | |
| dc.date.available | 2024-02-16T15:34:40Z | |
| dc.date.issued | 2010 | |
| dc.description.abstract | The pollution of the superficial and subsuperficial water occurred from the agricultural areas, can assume a great importance in the context of all sources of water pollution. In fact, the intensification of the agricultural activity, in particular the irrigated agriculture increases the use of the agrochemical products, and the problems in the soil and water bodies. When the climatic conditions are favorable, or the irrigation systems are not well operated, this is an economic problem from the farmers and an environmental problem from the society. The study area is a small basin (190 ha), located in centre of Portugal, near the Natural Park of International Tagus. It is well drained, and the agricultural activity is developed in two different seasons; the winter season where the farmers produce especially winter cereals, and the irrigation season where they produce typical crops in this region (corn, sorghum, tobacco), and recently bioenergetics crops like soybean. This study is focused in the water pollutants, nitrates and ammonium, sediments and total dissolved solids. Their dynamic in the basin, more or less dependent of the runoff, is different between pollutants and between both seasons. So, the nitrates load depends, all time, of the availability in the soil and the runoff volume, due to its solubility. The ammonium shows a different dynamic; when it is present in large amount in the soil, their load depends of the sediments load and the extremes peak flow, with high power to carry outside the basin. The total daily load of sediments not shows a direct relation with de runoff volume, except when it has a sufficient energy to detach and carry out, as in the extremes events. Therefore, the total daily load accumulated curve of this pollutant along the time, develops by levels related with each extreme event. Another aspect important to accentuate is the clear dependence of the amount of sediments to the conditions in the watershed, for similar intensity storms. For total dissolved solids, this study allows to conclude a very clear relation between the runoff volume and the load of this pollutant, in both seasons. In the other hand, this study not allows to conclude if the loss of this pollutant is higher in the winter or irrigation season. | pt_PT |
| dc.description.version | info:eu-repo/semantics/publishedVersion | pt_PT |
| dc.identifier.citation | DUARTE, A.C. (2010) - Water pollution induced by rainfed and irrigated agriculture in medirerranean environment, at basin scale. In BALWOIS-2010 Water Observation and Information System for Decision Support, Ohrid (Republic of Macedonia, 2010 - Proceedings. | pt_PT |
| dc.identifier.uri | http://hdl.handle.net/10400.11/8875 | |
| dc.language.iso | eng | pt_PT |
| dc.peerreviewed | yes | pt_PT |
| dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | pt_PT |
| dc.subject | Non point source | pt_PT |
| dc.subject | Water pollution | pt_PT |
| dc.subject | Rainfed agriculture | pt_PT |
| dc.subject | Irrigated agriculture | pt_PT |
| dc.subject | Watershed | pt_PT |
| dc.title | Water pollution induced by rainfed and irrigated agriculture in Medirerranean environment, at basin scale | pt_PT |
| dc.type | conference object | |
| dspace.entity.type | Publication | |
| oaire.citation.conferencePlace | Ohrid, República da Macedónia | pt_PT |
| oaire.citation.title | BALWOIS-2010 Water Observation and Information System for Decision Support | pt_PT |
| person.familyName | CANATÁRIO DUARTE | |
| person.givenName | ANTÓNIO | |
| person.identifier.ciencia-id | 0717-AB48-E1A3 | |
| person.identifier.orcid | 0000-0002-0319-378X | |
| person.identifier.scopus-author-id | 54901177900 | |
| rcaap.rights | openAccess | pt_PT |
| rcaap.type | conferenceObject | pt_PT |
| relation.isAuthorOfPublication | ff1ed167-3f68-4e2b-b092-aaa0eb28ae6b | |
| relation.isAuthorOfPublication.latestForDiscovery | ff1ed167-3f68-4e2b-b092-aaa0eb28ae6b |