Changes in Irrigation Planning and Development Parameters Due to Climate Change

Alejo, Lanie A.; Alejandro, Arlen S.

doi:10.1007/s11269-022-03105-4

Cited by 11 publications

(5 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Various studies have shown the adverse varied impacts of climate change on water resources in the Philippines. Climate change has been shown to decrease water availability in reservoirs as a result of decreased water supply and increased water demand, which will eventually lead to reduced irrigable areas, especially in dry years (Alejo & Alejandro 2022). The threat of severe flooding and excessive soil loss due to increased runoff and sediment yield are threats to the sustainability of ecosystems due to climate change (Panondi & Izumi 2021).…”

Section: Discussionmentioning

confidence: 99%

Modeling climate change impact on the inflow of the Magat reservoir using the Soil and Water Assessment Tool (SWAT) model for dam management

Singson

Alejo

Balderama

et al. 2023

Journal of Water and Climate Change

View full text Add to dashboard Cite

Understanding the impact of climate change on watersheds using hydrologic models is timely and vital to dam management. The study predicts changes in the inflow of the Magat reservoir using the Soil and Water Assessment Tool (SWAT) under the two Representative Concentration Pathway (RCP) scenarios for future centuries. The monthly calibration process (18 years) and validation process (10 years) of the model resulted in an NSE of 0.73, R2 of 0.74, RSR of 0.52, and PBIAS of 8.38 and NSE of 0.56, R2 of 0.62, RSR of 0.66, and a PBIAS of 17.3, respectively. Under RCP 4.5 and RCP 8.5 scenarios, the model predicted that during the dry and normal years, there will be an average decrease of inflow by 18.56 and 5.41% but an increase of 19.25% during the wet years. Peak flow will likely occur in September for all the scenarios, with a maximum discharge of up to 342.46 m3/s. The study recommends the integration of the model results to update the dam discharge protocol on the forecasting of monthly and annual inflows of the Magat dam to aid the dam management in observing long-term changes in the flow of water going into the reservoir.

show abstract

Section: Discussionmentioning

confidence: 99%

Modeling climate change impact on the inflow of the Magat reservoir using the Soil and Water Assessment Tool (SWAT) model for dam management

Singson

Alejo

Balderama

et al. 2023

Journal of Water and Climate Change

View full text Add to dashboard Cite

show abstract

“…The availability of water in agricultural systems is increasingly affected by climate change, characterized by rising temperatures, reduced rainfall, and prolonged droughts 6 , 7 . It is projected that by 2050, the demand for irrigation water will increase by 11% 8 , 9 , Consequently, future scenarios indicate potential conflicts arising from increased competition for water for irrigation especially in areas with decreased water resources 10 .…”

Section: Introductionmentioning

confidence: 99%

Silicon via fertigation with and without potassium application, improve physiological aspects of common beans cultivated under three water regimes in field

Gonzalez-Porras,

Teixeira,

Prado

et al. 2024

Sci Rep

View full text Add to dashboard Cite

Frequent droughts have led to an expansion of irrigated common bean (Phaseolus vulgaris L.) cultivation areas. An effective strategy to enhance water use efficiency and optimize crop growth is the application of silicon (Si) and potassium (K). However, the interaction between Si dosage, water regimes, and plant potassium status, as well as the underlying physiological mechanisms, remains unknown. This study aimed to assess the effects of Si doses applied via fertigation under various water regimes, in the presence and absence of potassium fertilization, on gas exchange, water use efficiency, and growth of Common beans in field conditions. Two experiments were conducted, one with and one without K supply, considering that the potassium content in the soil was 6.4 mmolc dm-3 in both experiments and a replacement dose of 50 kg ha was applied in the with K treatment, with the same treatments evaluated in both potassium conditions. The treatments comprised a 3 × 4 factorial design, encompassing three water regimes: 80% (no deficit), 60% (moderate water deficit), and 40% (severe water deficit) of soil water retention capacity, and four doses of Si supplied via fertigation: 0, 4, 8, and 12 kg ha−1. Where it was evaluated, content of photosynthetic pigments, fluorescence of photosynthesis, relative water content, leaf water potential and electrolyte extravasation, dry mass of leaves, stems and total. The optimal doses of Si for fertigation application, leading to increased Si absorption in plants, varied with decreasing soil water content. The respective values were 6.6, 7.0, and 7.1 kg ha−1 for the water regimes without deficit, with moderate water deficit, and with severe water deficit. Fertigation application of Si improved plant performance, particularly under severe water deficit, regardless of potassium status. This improvement was evident in relative water content, leaf water potential, and membrane resistance, directly impacting pigment content and gas exchange rates. The physiological effects resulted in enhanced photosynthesis in water-deficient plants, mitigating dry mass production losses. This research demonstrates, for the first time in common bean, the potential of Si to enhance irrigation efficiency in areas limited by low precipitation and water scarcity.

show abstract

“…For example, projections from general circulation models (GCMs) suggest a 1.5–3°C increase in mean temperature by 2060 throughout the western U.S. (Khatri & Strong, 2020). The anticipated hydrological impacts from warming will influence the hydrological cycle, including a more intense spring snowmelt runoff period occurring 1–3 weeks earlier and late‐season streamflow exhibiting up to a 50% reduction in flow (Muir et al, 2018; Siirila‐Woodburn et al, 2021), changes in the phase of precipitation (i.e., a trend toward an increase in rain vs. snow) (Ikeda et al, 2021; Liu et al, 2018; Musselman et al, 2018), and increased plant water needs from increases in evapotranspiration (i.e., increased demand placed on irrigation) (Alejo & Alejandro, 2022; Scanlon et al, 2021). While the hydrological impacts will be watershed‐specific, driving hydrological models with GCM simulations suggest an average 10% decrease in April–October streamflow yield coinciding with the timing of peak domestic water demand (Muir et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Preparing municipal water system planning for a changing climate: Integrating climate‐sensitive demand estimates

Johnson,

Burian,

Halgren

et al. 2023

J American Water Resour Assoc

View full text Add to dashboard Cite

Seasonality and a changing climate exert strong influences on supply and demand in the western United States, challenging municipal water system (MWS) management. Although supply and demand exhibit characteristics of nonstationarity, the commonly used econometric‐based models to estimate demands discount the influences of climate variability and trends in seasonal MWS vulnerability assessments. Given the projected impacts of climate change on water resources, we use the documented performance of a real‐world MWS with a calibrated systems model to investigate how demands modeled with and without the influences of climate impact system vulnerability indicators—determined by the exceedance of historical daily mean imported water—for MWS planning guidance. Neglecting climatic influences on MWS demands, the model overestimates the volume of imported water by up to 50% and misclassifies vulnerabilities during supply‐limiting conditions. The climate‐sensitive demand estimates reduced model error (i.e., <3% error) and correctly categorized vulnerabilities. Moreover, the MWS exhibited an average threefold greater sensitivity to percent changes in demand relative to percent changes in supply. The sensitivity to variances in demand emphasizes the need to account for factors influencing supply and demand when investigating the impacts of a changing climate, suggesting future research to examine the coupled influences of modeled supply and demand accuracy on MWS performance.

show abstract

Changes in Irrigation Planning and Development Parameters Due to Climate Change

Cited by 11 publications

References 27 publications

Modeling climate change impact on the inflow of the Magat reservoir using the Soil and Water Assessment Tool (SWAT) model for dam management

Modeling climate change impact on the inflow of the Magat reservoir using the Soil and Water Assessment Tool (SWAT) model for dam management

Silicon via fertigation with and without potassium application, improve physiological aspects of common beans cultivated under three water regimes in field

Preparing municipal water system planning for a changing climate: Integrating climate‐sensitive demand estimates

Contact Info

Product

Resources

About