Kapadia V.P.,Sardar Sarovar Narmada Nigam Ltd |
Rana V.M.,Sardar Sarovar Narmada Nigam Ltd
Water and Energy International | Year: 2011
An important parameter for performance evaluation of an irrigation system is the ratio of volume of water released from the sources to that actually applied in the field. Generally in the irrigation system, the farmers and the canal operators consultatively plan out the discharges from the off-taking points so as to meet the requirements of various parts of the command area. Requirements of water in various parts of the command area keep on changing as per the type of crops, sawing time, soil types, atmospheric conditions, etc. Therefore, steady state of canal, i.e., operating a canal at a specific discharge is not practicable in real world. Control system as a means of operating a canal essentially has an objective of achieving the steady state of the canal in the shortest time duration. It does so by efficiently working out the required depth of water for a specific discharge. It also involves instantaneous decision making about controlling the gate operations at the control structures in the canal. The paper discusses the philosophy of the auto-controller developed for the interconnected pools of the canal system of the Sardar Sarovar Project, Gujarat, India which has a huge main canal of about 532 km in length and discharge 1133 m 3 s -1, a large canal system of about 75,000 km length.
Dinesh Kumar M.,Institute for Resource Analysis and Policy |
Jagadeesan S.,Sardar Sarovar Narmada Nigam Ltd |
Sivamohan M.V.K.,Institute for Resource Analysis and Policy
International Journal of Water Resources Development | Year: 2014
A detailed study was conducted in six districts of Gujarat, India, in gravity- and lift-irrigated commands of the Sardar Sarovar Project to assess the direct and indirect benefits of canal irrigation. Benefits such as savings in the cost of energy used to pump groundwater for irrigation, reduction in well failures, and increased income of well irrigators from farming (crops and dairy) were remarkable. Groundwater augmented by recharge from gravity irrigation resulted in large economic returns to the well irrigators in the command areas and reduced the cost of domestic water supply in villages and towns (through improved yield of agro-wells and drinking-water wells, respectively). Canal irrigation also raised wages for workers, through enhanced agricultural labour demand along with appreciation of land markets. © 2014 © 2014 Taylor & Francis.
Joshi M.B.,Sardar Sarovar Narmada Nigam Ltd |
Kapadia V.P.,Sardar Sarovar Narmada Nigam Ltd
Irrigation and Drainage | Year: 2010
Water - considered the ''oil'' of the 21st century - has been at the core of every discussion on sustainable development. The 20th century witnessed many classical examples of conflicts and cooperation over water sharing. Amid increasing awareness of the ''scarcity value'' of water, there have been numerous examples of competing and conflicting views on the sharing of this prime natural resource and the elixir of life. While there is a strong apprehension that the next world war would be fought over water, there is an equally strong optimistic theory of water being a potent source of future cooperation. The paper stresses the need for rethinking the rationale to identify parameters such as utility-based classification, the economic value of its productive use, exchange of other natural resources and sharing of environmental impacts, that can improve its acceptability. Echoing hydro-hegemony, it concludes that in the 21st century a water-sharing rationale based merely on the argument for the ''life-sustaining value'' of water may not yield workable treaties and, apart from drinking needs, water, although a flowing resource, may be required to be shared on the basis of economic principles. Such rethinking on the rationale has also become necessary for ensuring sustainability of irrigated agriculture. © 2010 John Wiley & Sons, Ltd.
Kapadia V.P.,Sardar Sarovar Narmada Nigam Ltd. |
Joshi M.B.,Sardar Sarovar Narmada Nigam Ltd.
Water and Energy International | Year: 2010
Conjunctive use of water is always preferred from water quality, soil quality and water resources management points of view. However, it is observed that in real practice, it is extremely difficult to plan for the conjunctive use of water for different purposes and is more difficult to keep it in implementation for a long. Particularly in irrigation projects, command areas are designed to bank on the conjunctive use of water not only to overcome limited availability of surface water but also to avoid several problems likely to arise due to irrigation of land. Although conjunctive use is viewed as a necessity to ensure sustainability of irrigation, many difficulties are there on the way to implementing it and sustain it. Failure in implementing the conjunctive use may lead to a great dent up on the performance of any irrigation project and planning of the command area. The roadblocks to implementation of conjunctive use planning are discussed in the paper in order to shed light on the ground realities and the scenario at the planning and implementation stages. Raising issues like quality and quantity of available surface water and groundwater, infrastructural pre-requisites. operation and maintenance requirements, dependability of water and energy sources, suitability for different crops and irrigation methods, relative tariffs of water and electricity, economics of irrigated agriculture, lack of incentives for farmers, social constraints and so on, the paper focuses on the real world problems and attempts to pinpoint why project planning is unable to yield the results envisaged at the planning stage.