Bitte verwenden Sie diesen Link, um diese Publikation zu zitieren, oder auf sie als Internetquelle zu verweisen: https://hdl.handle.net/10419/222269 
Erscheinungsjahr: 
2020
Quellenangabe: 
[Journal:] Hydrological Sciences Journal [ISSN:] 2150-3435 [Volume:] 65 [Issue:] 6 [Publisher:] Taylor & Francis [Place:] Abingdon [Year:] 2020 [Pages:] 1005-1021
Verlag: 
Taylor & Francis, Abingdon
Zusammenfassung: 
Droughts can have serious negative impacts on the water quality needed for irrigated agriculture. The Metropolitan region of Chile is a relevant producer of high-value crops and is prone to droughts. Standardized Drought Indices were used to characterize meteorological and hydrological droughts for the period from 1985 to 2015. To understand the relationship between droughts and water quality, we evaluated the correlations between daily discharge and surface water quality observations. The threshold level method was used to compare physicochemical parameters during hydrological drought periods with the Chilean water quality thresholds for agricultural uses. A significant (p < 0.05) negative relationship between discharge and electrical conductivity and major ions was found in most of the basin. Hydrological stations located in irrigation districts exceeded the official thresholds for these parameters during hydrological drought periods seriously threatening irrigated agriculture of the region.
Schlagwörter: 
Mediterranean climate
climate change
meteorological drought
hydrological drought
standardized index
irrigated agriculture
water quality
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