A practical planning software program for desalination in agriculture - SPARE:WATERopt

Multsch, Sebastian; Grabowski, Daniel; Lüdering, Jochen; Alquwaizany, Abdulaziz S.; Lehnert, Karl-H.; Frede, Hans‐Georg; Winker, Peter

doi:10.1016/j.desal.2016.11.012

Cited by 18 publications

(12 citation statements)

References 53 publications

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“…An important aspect when assessing water scarcity caused by agricultural water consumption is return flows, e.g. due to evapotranspiration recycling (Berger et al, 2014) or water losses in irrigation systems (Pereira et al, 2002;Jägermeyr et al, 2015). We neglect evapotranspiration recycling effects in the present study, since great care has been taken to subdivide the study area into sub-catchments with sizes where this effect does not play a significant role.…”

Section: Discussionmentioning

confidence: 99%

“…The tool was applied to investigate several topics related to water resources management in recent years, e.g. the predicted future irrigation demands and impact of technology in the Nile river basin (Multsch et al, 2017a), managing desalinated seawater use in agriculture in Saudi Arabia (Multsch et al, 2017b) and characterising groundwater scarcity caused by large-scale irrigation in the USA (Multsch et al, 2016). First, the daily crop water balance was calculated at the 0.25 • × 0.25 • grid level for each crop per growing season, utilising the gridded climate and soils data (see Table 1).…”

Section: Calculation Of Green-and Blue-water Consumptionmentioning

confidence: 99%

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Assessment of potential implications of agricultural irrigation policy on surface water scarcity in Brazil

Multsch

Krol

Pahlow

et al. 2020

Hydrol. Earth Syst. Sci.

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Abstract. Expanding irrigated cropping areas is one of Brazil's strategies to increase agricultural production. This expansion is constrained by water policy goals to restrict water scarcity to acceptable levels. We therefore analysed the trade-off between levels of acceptable water scarcity and feasible expansion of irrigation. The appropriateness of water use in agricultural production was assessed in categories ranging from acceptable to very critical based on the river flow that is equalled or exceeded 95 % of the time (Q95) as an indicator for physical water availability. The crop water balance components were determined for 166 842 sub-catchments covering all of Brazil. The crops considered were cotton, rice, sugarcane, bean, cassava, corn, soybean and wheat, together accounting for 96 % of the harvested area of irrigated and rain-fed agriculture. On currently irrigated land irrigation must be discontinued on 54 % (2.3 Mha) for an acceptable water scarcity level, on 45 % (1.9 Mha) for a comfortable water scarcity level and on 35 % (1.5 Mha) for a worrying water scarcity level, in order to avoid critical water scarcity. An expansion of irrigated areas by irrigating all 45.6 Mha of the rain-fed area would strongly impact surface water resources, resulting in 26.0 Mha experiencing critical and very critical water scarcity. The results show in a spatially differentiated manner that potential future decisions regarding expanding irrigated cropping areas in Brazil must, while pursuing to intensify production practices, consider the likely regional effects on water scarcity levels, in order to reach sustainable agricultural production.

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Section: Discussionmentioning

confidence: 99%

Section: Calculation Of Green-and Blue-water Consumptionmentioning

confidence: 99%

Assessment of potential implications of agricultural irrigation policy on surface water scarcity in Brazil

Multsch

Krol

Pahlow

et al. 2020

Hydrol. Earth Syst. Sci.

View full text Add to dashboard Cite

show abstract

“…Soil salinization can reduce soil productivity in early stages; it also has a lethal effect on vegetation in advanced stages, and high salt concentrations inhibit the uptake of water by plants (Sagasta and Burke 2005). The worst panorama in this case could be a salt crust on the soil surface, making agriculture impossible (Multsch et al 2017).…”

Section: Potential Effects Of Drought Driven Water Quality Deterioratmentioning

confidence: 99%

Drought impacts on water quality and potential implications for agricultural production in the Maipo River Basin, Central Chile

Peña-Guerrero

Nauditt

Muñoz-Robles

et al. 2020

Hydrological Sciences Journal

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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.

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“…The tool was applied to investigate several topics related to water resources management in recent years, e.g. the predicted future irrigation demands and impact of technology in the Nile river basin (Multsch et al, 2017a), managing desalinated seawater use in agriculture in Saudi Arabia (Multsch et al, 2017b), and characterising groundwater scarcity caused by large scale irrigation in the USA (Multsch et al, 2016).…”

Section: Calculation Of Green and Blue Water Consumptionmentioning

confidence: 99%

Assessment of potential implications of agricultural irrigation policy on surface water scarcity in Brazil

Multsch¹,

Krol²,

Pahlow³

et al. 2019

Preprint

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Abstract. Expanding irrigated cropping areas is one of Brazil’s strategies to increase agricultural production. This expansion is constrained by water policy goals to restrict water scarcity to acceptable levels. We therefore analysed the trade-off between levels of acceptable water scarcity, and feasible expansion of irrigation. The appropriateness of water use in agricultural production was assessed in categories ranging from excellent to very critical based on the river flow that is equalled or exceeded for 95 % of the time (Q95) as indicator for physical water availability. The crop water balance components were determined for 166,842 sub-catchments covering all of Brazil. The crops considered were cotton, rice, sugarcane, beans, cassava, corn, soybean and wheat, together accounting for 96 % of the harvested area of irrigated and rainfed agriculture. On currently irrigated land irrigation must be discontinued on 53.6 % (2.30 Mha) for an excellent water scarcity level, on 44.5 % (1.91 Mha) for a comfortable water scarcity level and on 35.2 % (1.51 Mha) for a worrying water scarcity level, in order to avoid critical water scarcity. An expansion of irrigated areas by irrigating all 45.56 Mha of rainfed area would strongly impact surface water resources, resulting in 26.02 Mha experiencing critical and very critical water scarcity. The results show in a spatially differentiated manner that potential future decisions regarding expanding irrigated cropping areas in Brazil must, while pursuing to intensify production practices, consider the likely regional effects on water scarcity levels, in order to reach sustainable agricultural production.

show abstract

A practical planning software program for desalination in agriculture - SPARE:WATERopt

Cited by 18 publications

References 53 publications

Assessment of potential implications of agricultural irrigation policy on surface water scarcity in Brazil

Assessment of potential implications of agricultural irrigation policy on surface water scarcity in Brazil

Drought impacts on water quality and potential implications for agricultural production in the Maipo River Basin, Central Chile

Assessment of potential implications of agricultural irrigation policy on surface water scarcity in Brazil

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