Effect of Reference Conveyance Parameter Usage on Real Time Canal Performance: The Case of Fentale Irrigation Scheme in Ethiopia

Mohammed, Mebruk; Tefera, Adam

doi:10.4236/cweee.2017.61006

Cited by 4 publications

(5 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In any case, there is an orifice offtake, pump station, and checkpoint at the end of every pool. This example starts from an initial steady state, where the upstream boundary condition is a flow rate through gate one of 10 m 3 /s, and the checkpoint condition (at the end of each pool) is a water level of 2.0 m, which involves a constant flow rate (scheduled demand) of 5 m 3 /s by the orifice offtake regarding the initial canal conditions (Manning's coefficient [26,27], gate position, etc.). Furthermore, the water level is measured at every checkpoint every 5 min during an operational horizon of 4 h.…”

Section: Practical Example: a Canal With Two Poolsmentioning

confidence: 99%

The FC Algorithm to Estimate the Manning’s Roughness Coefficients of Irrigation Canals

Bonet

Russo²,

González³

et al. 2023

Agriculture

View full text Add to dashboard Cite

Freshwater scarcity has driven the integration of technological advancements and automation systems in agriculture in order to attempt to improve water-use efficiency. For irrigation canals, water-use efficiency is, in great measure, limited by the performance of management systems responsible for controlling the flow and delivering water to the farmers. Recent studies show a significant sensitivity of the results obtained from irrigation canal control algorithms with respect to the Manning’s roughness coefficient value, thus, highlighting the importance of its correct estimation to ensure an accurate and efficient water delivery service. This is the reason why the friction coefficient algorithm was developed, to monitor the real behaviour of any irrigation canal by calculating the Manning’s roughness coefficient constantly. The friction coefficient algorithm was conceived as a powerful offline tool that is integrated in a control diagram of any irrigation canal, concretely in an optimization control algorithm, which can reconfigure canal gates according to the current crop water demand and the real Manning’s roughness coefficient values. The friction coefficient algorithm has been applied in several irrigation canals and different scenarios, with accurate results obtaining an average Manning coefficient deviation among 2 × 10−4 and 4.5 × 10−4.

show abstract

Section: Practical Example: a Canal With Two Poolsmentioning

confidence: 99%

The FC Algorithm to Estimate the Manning’s Roughness Coefficients of Irrigation Canals

Bonet

Russo²,

González³

et al. 2023

Agriculture

View full text Add to dashboard Cite

show abstract

“…This difference is due to the conveyance loss, which caused by the breaking of the canals, siltation and improper cleaning of the grasses in the canals. Similarly Mohammed [3] reported that, the difference between the existing conveyance efficiency and expectation (design) was due to improper operation and maintenance of the canals.…”

Section: Overall Canals Conveyance Efficiency Performancementioning

confidence: 99%

“…It is the proportion of the outflow rate to the inflow rate of a system [2]. Water delivered to the farm or sphere is usually less than the water diverted from the root due to loss [3,13]. The conveyance efficiency mainly depends on the length of the canals, the soil type or the permeability of the canal banks and the condition of the canals [3].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Conveyance Efficiency and Maintenance Performance Evaluation of Canals at Serenta Irrigation Scheme, Northern Ethiopia

Gidey¹,

Siri²

2021

View full text Add to dashboard Cite

Evaluation of conveyance efficiency and maintenance performance of canals in irrigation schemes is very important to improve the productivity of the irrigation scheme as whole. Thus, results help to improve the canals problem and the water loss. However, canals conveyance efficiency of Serenta irrigation scheme is not yet evaluated. Therefore, this study was conducted to evaluate the canals conveyance efficiency and maintenance performance of the Serenta Irrigation Scheme. To evaluate the canals conveyance efficiency, canals flow were measured using Parshall flumes (for secondary and tertiary canals) and Floating method (for main canal). The results from the field measurement revealed that, the average conveyance efficiency of the main canal measured from five observations was 96.2%. The average discharge of this canal was 0.104m 3 /s at upper measuring point and 0.1m 3 /s at lower position. Thus, the amount of water lost was estimated to be 4 l/s or 0.0076 l/s/m. The source of loss was observed during the field visiting and measurement, which was due to seepage loss. From the 4 (four) secondary canals of the irrigation scheme, the average conveyance efficiency ranged from 75.86% to 91.9% with an overall mean efficiency of 86.3%. The lowest conveyance efficiency (75.86%) was observed in secondary canal 3 (SC-3). This reflected that the high amount of water loss, due to broken and cracked condition of the structure at this particular canal, which contributed for deep and off farm loss. And, the average conveyance efficiencies of the tertiary canals ranged from 63.5% to 91.3%, with the overall mean value of 76.6%. The low conveyance efficiency observed in tertiary canal 6 (TC-6), implied for high mount of loss, due to the weak earth work canal (small width), a lot of water was flowing over the canal. Unlike the main canal the secondary and tertiary canals were under performance. So to reduce water loss and improve the performance the irrigation scheme, the conveyance efficiency of the irrigation scheme should be improved through regular canal cleaning and maintenance of the broken structures by mobilizing farmers to participate on the activities.

show abstract

“…The seepage loss in the irrigation canals accounts for the major portion of water conveyance loss (98.37%) while approximately 0.3 percent of the total stream is lost due to evaporation [1]. The damage to the canal hydraulic parameters triggers to seepage losses, therefore, the assessment of the potential cause of canal hydraulic inefficiency is vital for the sustainable functionality of irrigation schemes [6]. Aquatic weeds may be defined as upsetting or unsightly plants growing where they are not wanted.…”

Section: Introductionmentioning

confidence: 99%

Vegetation growth impacts conveyance efficiency of irrigation canals - a geo-drone approach

Kulkarni

Nagarajan

2018

IJET

View full text Add to dashboard Cite

In spite of canals are most important conveyance systems for delivering water for irrigation in the alluvial plains of India, many irrigation canal projects are suffering from massive growth aquatic plants along the canal sides known as aquatic weeds and siltation along canal bed. Aquatic weeds are unwanted plants playing a very important role in different eco-systems and many of them cause enormous direct and indirect losses. The losses include interference with the cultivation of crops, loss of biodiversity, loss of potentially productive lands, loss of grazing areas and livestock production, erosion following fires in heavily invaded areas, choking of navigational and irrigation canals and reduction of available water in water bodies. Also, it has been found that it severely reduces the flow capacity of irrigation canals thereby reducing the availability of water to the farmers. The vegetation on bottom and sides of the canal increases the roughness resulted into a decrease in velocity which further leads to silt deposition on canal bed which affects the canal functions. The complexity of these situations has resulted in a need for identification of impact of weeds on the hydraulic efficiency of canals. For accurate identification of weeds, low altitude drone survey becomes an innovative solution than other conventional methods. This study captured vegetation along the canal using the drone images and estimated roughness shows, the reduction in conveyance efficiency by 21.90% compared with design data.

show abstract

Effect of Reference Conveyance Parameter Usage on Real Time Canal Performance: The Case of Fentale Irrigation Scheme in Ethiopia

Cited by 4 publications

References 3 publications

The FC Algorithm to Estimate the Manning’s Roughness Coefficients of Irrigation Canals

The FC Algorithm to Estimate the Manning’s Roughness Coefficients of Irrigation Canals

Conveyance Efficiency and Maintenance Performance Evaluation of Canals at Serenta Irrigation Scheme, Northern Ethiopia

Vegetation growth impacts conveyance efficiency of irrigation canals - a geo-drone approach

Contact Info

Product

Resources

About