Discharge estimation for trapezoidal open channels applying fuzzy transformation method to a flow equation

Samarinas, Nikiforos; Evangelides, Christos

doi:10.2166/ws.2021.155

Cited by 5 publications

(3 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this study, the actual supply in Jangan Reservoir was calculated based on canal flow measurement, which was compared with the calculations using the theoretical flow, S2. As S2 depends on the Manning formula, the calculation was based on the roughness coefficient, the resistance to flow in the canal; this is a function of the canal wall material in contact with the water affects the roughness coefficient [43,44]. Choi et al [45] reported that the roughness coefficients varied for different canals.…”

Section: Discussionmentioning

confidence: 99%

A Strategy to Quantify Water Supply of an Agricultural Reservoir for Integrated Water Management Policy

2022

View full text Add to dashboard Cite

A data-driven approach is required to scientifically manage agricultural water resources in accordance with the integrated water management policy of South Korea. In this study, a quantification strategy is presented to calculate reservoir supply by comparing the results with the actual reservoir water storage. Strategies considering current calculation methods were divided into canal flow measurement (S1), theoretical flow rate (S2), water storage decrease in field practice (S3), and water demand in design practice (S4), utilizing water levels of the reservoir and its canal and the level–flow rate curve obtained from surveying the canal flow. Each strategy was assessed through hydrological verification of reservoir water balance modeling. Based on the determination coefficient (R2), Nash–Sutcliffe efficiency (NSE), and relative error (RE) values, the S1 method was found to be the most suitable. S2 had lower reliability than S1, while S3 and S4 satisfied neither R2 nor NSE and had a larger RE than S1 and S2. To accurately quantify agricultural water supplies, the importance of directly measuring reservoir canal flows must be emphasized using automatic water level and flow gauges in canals. This study provides insights into more scientific management of agricultural reservoir water supplies and more effective monitoring of agricultural water usage.

show abstract

Section: Discussionmentioning

confidence: 99%

A Strategy to Quantify Water Supply of an Agricultural Reservoir for Integrated Water Management Policy

2022

View full text Add to dashboard Cite

show abstract

“…Successfully tested methods for improving irrigation efficiency for quantity (Hui et al 2021a(Hui et al , 2021b and quality (Jie et al 2021;Lemos et al 2021;Lima et al 2021;Tao et al 2021;Xie & Hung 2021;Zhang et al 2021) are also addressed as one of the utmost prospectives in agricultural water management. Notable results on hydraulic irrigation networks and equipment/systems (Samarinas & Evangelides 2021;Shi et al 2021;Sun et al 2021) are presented as well. Finally, this SI highlights the benefits in the adaptability of agronomical practices and decision-making systems to release climatic water effects on crops and ensure long-term stability of ecosystems (Biswas et al 2021;Economidou et al 2021;Gkiatas et al 2021;Morianou et al 2021b;Ragkos & Ambas 2021).…”

Section: This Special Issuementioning

confidence: 99%

Editorial: Could advances in geoinformatics, irrigation management and climate adaptive agronomic practices ensure the sustainability of water supply in agriculture?

Kourgialas

2021

Water Supply

View full text Add to dashboard Cite

The Food and Agriculture Organization (FAO) predicts that up to 2050, food production will increase by about 70% above today's levels. This increase in food production could be accomplished by developing more agricultural land and transitioning from rainfed to irrigated agriculture. The development of the agricultural sector is interrelated with the effective management of water resources as irrigated agriculture is the world's largest water consumer with trends of increasing irrigation needs and pollution load in the oncoming years (Ricciardi et al. 2020). Water supply in the rural sector is expected to be most affected by climate change with reduced crop yields due to declining water availability and abandonment of climate-disadvantaged parcels. Agricultural production stability faces many challenges related to climate-water effects, with the following being of utmost importance: changes in levels and frequency of precipitation, more frequent dry spells, increased extreme weather events including flash droughts/floods, losses of agricultural lands due to water erosion, salinization of coastal cultivated areas and freshwater, as well as surface and groundwater contamination by fertilizers or other agronomically related sources of pollution. Introducing and incorporating efficient use and management practices of irrigation water to new climate-smart production methods is a vital priority for major sectoral policies, notably the Common Agricultural Policy (CAP) (Kourgialas, 2021).In line with this, of high importance for water policy makers is to establish effective agricultural water management strategies to enhance preparedness and capacity to respond to the impacts of climate change and anthropogenic interventions. These strategies should focus on three key objectives, which, once they scale up, can increase the resilience of agriculture as a whole. These three objectives are related to: advanced geoinformatics tools, proper irrigation management and climatic wateradaptive agronomic practices (Grafton et al. 2018).Thereby, the answer to the question of this Editorial 'Could advances in geoinformatics, irrigation management and climate adaptive agronomic practices ensure the sustainability of water supply in agriculture?' is certainly YES. The sustainability of water supply in cropping systems could be effectively addressed based on the advantages that raised from the abovementioned key objectives divided in turn into the following scientific topics:

show abstract

“…In general, fuzzy methodology has already been recognized as an innovative approach to handling problem uncertainties with several works in different scientific fields [59][60][61][62][63] but to our knowledge, a limited number of studies have been published recently concerning fuzzy FEM models and are mainly in structural mechanics [31,[64][65][66][67].…”

Section: Introductionmentioning

confidence: 99%

Fuzzy Finite Elements Solution Describing Recession Flow in Unconfined Aquifers

Tzimopoulos,

Papadopoulos,

Samarinas

et al. 2024

Hydrology

View full text Add to dashboard Cite

In this work, a novel fuzzy FEM (Finite Elements Method) numerical solution describing the recession flow in unconfined aquifers is proposed. In general, recession flow and drainage problems can be described by the nonlinear Boussinesq equation, while the introduced hydraulic parameters (Conductivity K and Porosity S) present significant uncertainties for various reasons (e.g., spatial distribution, human errors, etc.). Considering the general lack of in situ measurements for these parameters as well as the certain spatial variability that they present in field scales, a fuzzy approach was adopted to include the problem uncertainties and cover the disadvantage of ground truth missing data. The overall problem is encountered with a new approximate fuzzy FEM numerical solution, leading to a system of crisp boundary value problems. To prove the validity and efficiency of the new fuzzy FEM, a comparative analysis between the proposed approach and other well-known and tested approximations was carried out. According to the results, the proposed FEM numerical solution agrees with Karadinumerical method for the crisp case and is in close agreement with the original analytical solution proposed by Boussinesq in 1904 with the absolute reduced error to be 4.6‰. Additionally, the possibility theory is applied, enabling the engineers and designers of irrigation, drainage, and water resources projects to gain knowledge of hydraulic properties (e.g., water level, outflow volume) and make the right decisions for rational and productive engineering studies.

show abstract

Discharge estimation for trapezoidal open channels applying fuzzy transformation method to a flow equation

Cited by 5 publications

References 19 publications

A Strategy to Quantify Water Supply of an Agricultural Reservoir for Integrated Water Management Policy

A Strategy to Quantify Water Supply of an Agricultural Reservoir for Integrated Water Management Policy

Editorial: Could advances in geoinformatics, irrigation management and climate adaptive agronomic practices ensure the sustainability of water supply in agriculture?

Fuzzy Finite Elements Solution Describing Recession Flow in Unconfined Aquifers

Contact Info

Product

Resources

About