Resolving the paradoxes of irrigation efficiency: Irrigated systems accounting analyses depletion-based water conservation for reallocation DOI Creative Commons
Bruce Lankford

Agricultural Water Management, Journal Year: 2023, Volume and Issue: 287, P. 108437 - 108437

Published: July 28, 2023

The irrigation efficiency paradox says that raising the of systems, thereby reducing return flows, either gives no change in water depletion or it raises via increased evapotranspiration and irrigated area. While this can occur, there are problems associated with it. It eludes precise explanation characterisation; be confused other hydrology paradoxes; is one several ways areas increase; over-emphasises role flows; relies on variables (usually unstated) being uncontrolled; inverted to reduce depletion; may mistakenly guide conservation systems. Addressing these concerns, a comprehensive predictive model called Irrigated Systems Accounting (ISA) analyses undergoing based accounts for soil-crop evapotranspiration, (IE), practices infrastructure, withdrawals, depletion, crop production reallocation. By using more calculi than current accounting, ISA; resolves predicts how an system changes its aggregate area primary, expansion reuse zones; reveals non-IE factors drive up but not necessarily depletion. Compiling all zonal reductions derived reallocated users without cutting production. paper concludes hazards policy if exclusively tied together imprecise characterisations draw accounting models containing few terms relationships.

Language: Английский

Adapting agriculture to climate change via sustainable irrigation: biophysical potentials and feedbacks DOI Creative Commons
Lorenzo Rosa

Environmental Research Letters, Journal Year: 2022, Volume and Issue: 17(6), P. 063008 - 063008

Published: May 27, 2022

Abstract Irrigated agriculture accounts for ∼90% of anthropogenic freshwater consumption, is deployed on 22% cultivated land, and provides 40% global food production. Expanding irrigation onto currently underperforming rainfed croplands crucial to meet future demand without further agricultural expansion associated encroachment natural ecosystems. Establishing also a potential climate adaptation solution alleviate heat- water-stress crops reduce variability extremes. Despite being one the land management practices with largest environmental hydroclimatic impacts, role adapt change achieve sustainability goals has just started be quantified. This study reviews biophysical opportunities feedbacks ‘sustainable irrigation’. I describe concept sustainable expansion—where there are increase productivity over water-limited by adopting that do not deplete stocks impair aquatic may avert but create additional externalities often neglected. review highlights major gaps in analysis understanding change. implications (a) security, (b) conditions, (c) water quality, (d) soil salinization, (e) storage infrastructure, (f) energy use. These help explain challenges achieving irrigated thus point toward solutions research needs.

Language: Английский

Citations

124
Utilization of sewage sludge to manage saline–alkali soil and increase crop production: Is it safe or not? DOI Creative Commons
Muhammad Yousuf Jat Baloch, Wenjing Zhang, Tahira Sultana

et al.

Environmental Technology & Innovation, Journal Year: 2023, Volume and Issue: 32, P. 103266 - 103266

Published: July 4, 2023

Saline-alkali soil has become significant problem for global agriculture and food security as these soils have poor physicochemical conditions reduce crop production by causing a wide range of physiological biochemical changes in plants. More than 800 million hectares (Mha) land throughout the world affected saline-alkali soil, which accounts 6% total area about 62 Mha or 20% world's irrigated is soil. Numerous studies on been conducted years an attempt to plant productivity losses. Utilizing sewage sludge (SS) efficient way improve its physiochemical properties soil's health yield. However, in-depth mechanisms utilization sludge, their nutrient levels, toxic harmful substances such heavy metals, pathogenic microorganisms, antibiotics, resistant genes that affect yield, groundwater quality, ecological risks are still uncertain. This review enhances awareness knowledge explore sustainable mode SS growth with rhizosphere effect, micro-ecology, carbon nitrogen cycle enhancement. The potential future perspectives research limitations also discussed article.

Language: Английский

Citations

63
Global energy use and carbon emissions from irrigated agriculture DOI Creative Commons
Jingxiu Qin, Weili Duan, Shan Zou

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: April 10, 2024

Abstract Irrigation is a land management practice with major environmental impacts. However, global energy consumption and carbon emissions resulting from irrigation remain unknown. We assess the worldwide associated irrigation, while also measuring potential reductions achievable through adoption of efficient low-carbon practices. Currently, contributes 216 million metric tons CO 2 consumes 1896 petajoules annually, representing 15% greenhouse gas utilized in agricultural operations. Despite only 40% irrigated agriculture relies on groundwater sources, pumping accounts for 89% total irrigation. Projections indicate that future expansion could lead to 28% increase usage. Embracing highly efficient, methods has cut half reduce by 90%. considering country-specific feasibility mitigation options, may see 55% reduction. Our research offers comprehensive insights into contributing valuable information can guide assessments viability enhancing adaptive capacity within sector.

Language: Английский

Citations

56
Global water gaps under future warming levels DOI Creative Commons
Lorenzo Rosa, Matteo Sangiorgio

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: Jan. 30, 2025

Abstract Understanding the impacts of climate change on water resources is crucial for developing effective adaptation strategies. We quantify “water gaps”, or unsustainable use – shortfall where demand exceeds supply, resulting in scarcity. baseline and future gaps using a multi-model analysis that incorporates two plausible warming scenarios. The global gap stands at 457.9 km 3 /yr, with projections indicating an increase 26.5 /yr (+5.8%) 67.4 (+14.7%) under 1.5 °C scenarios, respectively. These highlight uneven impact levels gaps, emphasizing need continued mitigation to alleviate stress resources. Our results also underscore unequal needs across countries basins, influenced by varying important regional differences model variability complicating projections. Robust management strategies are needed tackle escalating scarcity caused warming.

Language: Английский

Citations

6
The rise of the Nash-Sutcliffe Efficiency in hydrology DOI Creative Commons
Lieke Melsen, Arnald Puy, P.J.J.F. Torfs

et al.

Hydrological Sciences Journal, Journal Year: 2025, Volume and Issue: unknown

Published: March 10, 2025

The Nash-Sutcliffe Efficiency (NSE) is commonly used as model evaluation metric in hydrology, but its prominence often taken for granted. This study explores the social factors behind adoption. Introduced 1970, NSE gained traction computational advancements spurred growth of hydrological models and metrics. This, turn, led to need converge on broadly accepted In 1990, a committee recommended alongside two other One main developers SWAT, widely model, adopted only part this recommendation, solidifying NSE's dominance. storyline shows that primacy appears be derived more from tradition than demonstration technical superiority. To date, path dependence visible ongoing research efforts resulting popularity NSE. historical perspective highlights how processes have shaped way are evaluated.

Language: Английский

Citations

2
The delusive accuracy of global irrigation water withdrawal estimates DOI Creative Commons
Arnald Puy, Razi Sheikholeslami, Hoshin V. Gupta

et al.

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: June 8, 2022

Miscalculating the volumes of water withdrawn for irrigation, largest consumer freshwater in world, jeopardizes sustainable management. Hydrological models quantify withdrawals, but their estimates are unduly precise. Model imperfections need to be appreciated avoid policy misjudgements.

Language: Английский

Citations

64
Sensitivity analysis: A discipline coming of age DOI Creative Commons
Andrea Saltelli, Anthony J. Jakeman, Saman Razavi

et al.

Environmental Modelling & Software, Journal Year: 2021, Volume and Issue: 146, P. 105226 - 105226

Published: Oct. 9, 2021

Sensitivity analysis (SA) as a 'formal' and 'standard' component of scientific development policy support is relatively young. Many researchers practitioners from wide range disciplines have contributed to SA over the last three decades, SAMO (sensitivity model output) conferences, since 1995, been primary driver breeding community culture in this heterogeneous population. Now, evolving into mature independent field science, indeed discipline with emerging applications extending well new areas such data science machine learning. At growth stage, present editorial leads special issue consisting one Position Paper on "The future sensitivity analysis" 11 research papers "Sensitivity for environmental modelling" published Environmental Modelling & Software 2020–21.

Language: Английский

Citations

60
Hygroscopic polymer gels toward atmospheric moisture exploitations for energy management and freshwater generation DOI Creative Commons
Feng Ni, Peng Xiao, Chang Zhang

et al.

Matter, Journal Year: 2022, Volume and Issue: 5(9), P. 2624 - 2658

Published: Sept. 1, 2022

Language: Английский

Citations

47
Models with higher effective dimensions tend to produce more uncertain estimates DOI Creative Commons
Arnald Puy,

Pierfrancesco Beneventano,

Simon A. Levin

et al.

Science Advances, Journal Year: 2022, Volume and Issue: 8(42)

Published: Oct. 19, 2022

Mathematical models are getting increasingly detailed to better predict phenomena or gain more accurate insights into the dynamics of a system interest, even when there no validation training data available. Here, we show through ANOVA and statistical theory that this practice promotes fuzzier estimates because it generally increases model's effective dimensions, i.e., number influential parameters weight high-order interactions. By tracking evolution dimensions output uncertainty at each model upgrade stage, modelers can ponder whether addition detail truly matches purpose quality fed it.

Language: Английский

Citations

46
Functional relationships reveal differences in the water cycle representation of global water models DOI Creative Commons
Sebastian Gnann, Robert Reinecke, Lina Stein

et al.

Nature Water, Journal Year: 2023, Volume and Issue: 1(12), P. 1079 - 1090

Published: Nov. 27, 2023

Language: Английский

Citations

31