Field measurement and analysis of water losses at the main and tertiary levels of irrigation canals: Varamin Irrigation Scheme, Iran

Mohammadi, Amir H.; Rizi, Atefeh Parvaresh; Abbasi, Nader

doi:10.1016/j.gecco.2019.e00646

Cited by 26 publications

(15 citation statements)

References 9 publications

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“…In order to reduce the conveyance losses from the water transfer path, it is mandatory to find out the exact quantity of water conveyance efficiency. Conveyance efficiency of any irrigation system is defined as the ratio of the amount of water delivered by the irrigation system to the amount of water diverted from the distribution system [20]. The conveyance efficiency of any irrigation system depends on number of factors such as channel length, conditions of lining, soil and channel characteristics [21].…”

Section: Conveyance Efficiencymentioning

confidence: 99%

“…Conveyance losses are affected by number of factors such as depth of water, quality of channel lining, channel dimensions, bed slope, volume of sediment, age of channel, volume of flow, velocity of flow and the quality of operations and maintenance of water channels [20]. Conveyance losses in this study were simply computed by subtracting obtained conveyance efficiency at each reference point from 100 [22].…”

Section: Conveyance Lossesmentioning

confidence: 99%

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Analysis of Conveyance Losses from Tertiary Irrigation Network

et al. 2021

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Irrigation canals are generally made through porous soil formations, since the soil is loose porous media – a huge amount of canal water is lost to conveyance losses. The situation becomes direr when these losses result in non-beneficial losses. The Sindh province of Pakistan has more than 70% saline groundwater, conveyance losses to such areas in the province not only become unusable but also creates water management problems. Perhaps the only cost-effective way to address these losses is canal lining. The present study was conducted in the command area of Belharo distributary, Sindh, Pakistan with an aim to determine the extent of losses from the tertiary irrigated network as these water channels are less considered in the literature with regards of conveyance losses. Using water balance method, conveyance efficiency and conveyance losses at 30% lined and 50 and 75% unlined length of the watercourses was observed. The results revealed that the tertiary irrigation channels face an average of 43% conveyance losses and major proportion of these losses is lost to non-beneficial losses from the study area. The study further suggests 75% lining of watercourses in order to minimize non-beneficial losses. This study also infers that with the use of geo-membrane lining, sizeable amount of fresh water can be saved. Doi: 10.28991/cej-2021-03091756 Full Text: PDF

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Section: Conveyance Efficiencymentioning

confidence: 99%

Section: Conveyance Lossesmentioning

confidence: 99%

Analysis of Conveyance Losses from Tertiary Irrigation Network

et al. 2021

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“…Efficient water use and management are currently a significant concern in many countries of the world, including Indonesia, [9][10][11][12]. Meanwhile, the losses of water during distribution are calculated as follows (Equation 6) [13].…”

Section: Analysis Of the Water Losses In The Channelmentioning

confidence: 99%

Net present value (NPV) of the rehabilitated irrigation channels to increase agricultural production

Iskandar¹,

Anugerah²,

Kusuma³

2021

IJATEE

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Sustainable agriculture is required to meet the needs of the present and future generations while ensuring the provision of benefits, environmental sustainability as well as social and economic justice. The Food and Agriculture Organization (FAO) is promoting Sufficiency Food and Agriculture (SFA) to help countries worldwide achieve zero hunger and Sustainable Development Goals (SDGs). This is considered necessary due to the projection of a global food crisis [1].

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“…A field irrigation efficiency and a conveyance efficiency of 60 and 80%, respectively, were assumed, which are the loss rates commonly used in operation studies in the region. Twenty per cent of conveyance loss was assumed to replenish groundwater through seepage flows and the evaporation in irrigation canals were considered as insignificant (Mohammadi et al, 2019). The command area under each tank was also obtained by the DAD and PID.…”

Section: Weap Setup Of the Ranorawa Cascadementioning

confidence: 99%

Hydrological and water balance studies to evaluate options for climate resilience in smallholder irrigation systems in Sri Lanka

Imbulana¹,

Manoharan²

2020

Water Policy

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Smallholder agriculture shares a great portion of Sri Lanka's economy and provides a livelihood to 20% of the country's labour force. However, smallholder agricultural systems are considered highly vulnerable to climate variability and change. As such, improving their climate resilience is critical to ensuring sustainable development of the country. In the country's dry zone, agricultural systems are supported by thousands of small and large irrigation tanks in cascades, whose water supply potential keeps fluctuating widely between years and seasons due to rainfall variability which is a unique characteristic of this zone. In this study, we assessed the hydrological potential of the catchments of these tanks in a typical irrigation system and provided a framework to design an optimal strategy to enhance climate resilience of such systems for improved agricultural production, using a water balance model. The results show that climate-induced impacts on hydrology coupled with population growth and agricultural expansion increase irrigation water demands in the near future. Moreover, demand-side interventions will be more effective than supply-side adaptation in reducing the demand-supply gap. The study recommends evaluating more adaptation measures under expert guidance, uncertainty assessments of future climate and socio-economic pathways, and incorporating a cost-benefit assessment in the model.

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Field measurement and analysis of water losses at the main and tertiary levels of irrigation canals: Varamin Irrigation Scheme, Iran

Cited by 26 publications

References 9 publications

Analysis of Conveyance Losses from Tertiary Irrigation Network

Analysis of Conveyance Losses from Tertiary Irrigation Network

Net present value (NPV) of the rehabilitated irrigation channels to increase agricultural production

Hydrological and water balance studies to evaluate options for climate resilience in smallholder irrigation systems in Sri Lanka

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