krishana bhagya jala nigam limited

The Government of Karnataka, IndiaWater Resources Department

Welcome

Krishana bhagya jala nigam limitedA Government of Karnataka Under Taking

Presented By: Riazahemad B Jagadal Assistant Engineer Mulwad Lift Irrigation Scheme Stage III

Report on features ofIrrigation Water conveyance systemand its Modernisation

2A Government of Karnataka Under Taking

Presented By : Riazahemad Jagadal Assistant EngineerNo irrigation system is worth a hill of beans if the water is not available to the crop at the time that the plants require it

3A Government of Karnataka Under Taking

Presented By : Riazahemad Jagadal Assistant Engineer We can Administrate/ Manage the water conveyance system by listening to the water what it is conveyingA good Administrator is a good Listener

4Water is Wealth and Irrigation is its application.Water is a vital resource for mankind used in activities such as agriculture, industry and domestic activity. Irrigation is one of the most water consuming resources in human activity. Irrigation canals are characterized for being spatially distributed crossing different administrative regions. As water is becoming a scarce and valuable resource, efficient engineering water conveyance networks are required.Irrigationis the artificialexploitationanddistributionof water atproject levelaiming atapplicationof water atfield levelto agricultural crops in dry areas or in periods of scarcerainfallto assure or improve crop production.

5

Baluti Jack well

Lead off canal

Hanamapur Jack well

Arial ViewBaluti Jack WellAlmatti Dam ReservoirLead Off CanalHanamapur Jack WellBaluti VillageHanamapurVillageK B J N L

6Baluti Jack Well

Raising Mains

Delivery Chamber I

Arial View

7Hanamapur Jack Well

Raising Mains

Delivery Chamber ii

Arial View

8Mulwad West CanalArial View

9Mulwad East CanalArial View

10Mulwad Lift Irrigation ExistingConventional Water Conveyance SystemWater Lifted From Back Waters of Almatti Reservoir @ Baluti Village Baluti Jack Well at Min Water Level of Lift Point @ 504.75m to Max Water Level @ Lift Point 524.25mRaising Mains 2 row 2.35 m Diameter to DC IDc i at 529.55mLead Off Canal to Hanamapur Jack Well BW-5.5m , CBL-527.35, Length 5 Km.Hanamapur Jack Well at Min Water Level @ Lift Point 526.543m to Max Water Level 528.743m.

Baluti Jack WellBaluti Raising MainsBaluti Delivery Chamber ILead Off CanalHanamapur Jack well Intake

11M L I Scheme A From Hanamapur Jack Well To DC ii at RL: 559.95 through a rising mains 2 row 1.8 diameter & 1215m in Length

12Water Diverted From Delivery Chamber ii to MLI East and West CanalsEast Canal 17.5 KmWest Canal 76 Km

Delivery Chamber ii

13 Canal Network and Command AreaScheme B Presented By : Riazahemad Jagadal Assistant Engineer Mulwad LIS Stage III

Key Plan

Command Area

BIJAPUR Branch Canal =63650.H Hippargi Canal = 23676.B Bagewadi canal =22648.Tidgundi canal =25775.

Malghan Main Canal = 21716.

Babaleshwar canal = 16286. Mangoli canal =18426.

Salvadgi Canal =10868.Sankanal canal =12471.Takkalki canal =9559.Dhindwar canal =2866

Network Tree Plan

17Design ReviewThe conventional System

As per Conventional Design

19During No Demand water has to be diverted to Escape Channels

20During Pump ON

On each start of pump the Travel Time of water required for 50 km with velocity 0.75m/sec is 18 hrs 31 min

21A Struggle for waterDepleted Water SupplyPresented By : Riazahemad Jagadal Assistant Engineer

Struggle for water

Scheme A is started on Jan 2006 up to 20 km, as 2 pumps only started authorities plan to obstruct flow to rise the water level in canal by constructing walls, but when west canal is complete in all respects, Full Length is under Irrigation for peak discharge they have to demolish the walls.Subsequently the method is followed by farmer near outlet they try to fill the canal passage by dumping the boulder to raise water level whenever 2 pumps run during repairs or so.Department Engineers Went on Cleaning every Year taking up Maintenance.Outlets and operators were manhandled During Less Pump Run or Repair of pumps.

The Conventional SystemDemerits

Demerits of Conventional Water Conveyance System for Lift Irrigations canalsFull Supply Level is Not Constant as 24x7 pumping is not practiced throughout the season.The Fluctuating Water Level Due to On/ Off of Pumps or Number of Pumps running is less than the Design Numbers Pumps to run, Distributaries Outlets function under design discharge as Depth of water in Canal is under the mark of 2/3 FSD as driving Head is Not Available.If No Demand Water is Wasted by letting out water through Escape channels or FIC were Diverted to Natural drainage streams by farmers(Nalas).Due to Pump go On /Off, before FSD in Canal raises to design level the water is discharged to outlets so tail end never reach Designed FSD mark, if outlets not operated in time due to more discharge at tail-end, overtopping of water may occurs. If operated prior the FSD of the tail end doesn't gain Head . If manipulated the head, by operator and resolved the complexity of operation then pumps go off, in this struggle to have control over outlets & FSD level which Leads to Management failure.

25Demerits of Conventional Water Conveyance System to Fields and FarmersTail-end problems examples.The oldSardar canalproject in the state ofGujarat, India, was designed with an irrigation intensity of 32%, but at the upstream part the delivery was at an intensity of 42% (i.e. 131% of the design norm) and at the downstream end it was only 19% (i.e. 59% of the norm), although the project aimed at protective irrigation with equal rights for all.TheSardar Sahayak Pariyojanairrigation project, an extension of the Sardar canal project with 1.7 million ha, the head farmers received 5 times more water than the tail-enders, although the project was designed for equal distribution of the scarce water.TheGhatampurdistributary canal in theRamgangairrigation project in the state ofUttar Pradesh, India, delivered an amount of water equal to 155% of the design discharge to theKisarwaldistrict canal near the head of the distributary and only 22% to theBairampurdistrict canal at the downstream end.TheIbrahimiyairrigation canal near Minya,Egypt in 1984, considerable differences in the water distribution over the canal systems have been reported[15]:

Over Irrigationbecause of poorDistribution ormanagement the water is wasted, and Deep drainage (from over-irrigation) may result in rising water tables which in some instances will lead to problems of irrigationsalinitymay damage soil structure owing to the formation ofalkaline soil.

CompetitionIn practice the distribution of irrigation water is subject to competition. Influential farmers may be able to acquire more water than they are entitled to. Water users at the upstream part of the irrigation system can more easily intercept extra water than the tail-ender. The degree of farmers' influence is oftencorrelatedto the relative position of their land in the topography of the scheme.

26A Solution to All the Conveyance ProblemsConceptPresented By : Riazahemad Jagadal Assistant Engineer

Water Filled in one tank rises the water level in another tank And if orifice opened empty at same time in both tanksWater filled in one tank and discharge in another keep both water level at constant.Fluid flow from Orifice can be measured.Closing the Orifice again water level in tank rises.Tank Filling

28Tank Fill TimeMultilevel Pool Water Conveyance SystemPresented By : Riazahemad Jagadal Assistant Engineer

Time required for tank water transfer from one full tank to another empty tank

Time required for tank water transfer from one full tank to another partially filled tank

with initial Diff in FSD of 1.9m to rise 0.9 m to 1m FSD difference i.e. Full Tank Time Required to rise the level in the 3rd Tank is = 10000*5*0.9/15.5= 2903.226 sec or say 48.3871 min 0 hrs 48.39 minutes

Hydraulic Jump

MeritsMulti-Level Pool Irrigation System

Merits over Conventional System Travel Time Required is only one time during first filling the Tanks all along the stretch of network.Any section of Canal in any reach, may be upstream of canal, or at tail end. can be filled with same amount of time. no travel time needed. Full supply Level in all pools. always Maintained at FSD Level. Easy Maintenance of Any section. Through out the year. for silt removal or repairs. No Wastage of Water to escape Channels. or to Nalas. Crop pattern and water scheduling can be implemented. Easy measurement of evaporation and seepage losses. Easy Management as controlled discharge as per requirement. No over topping of Canals. Farmer at tail end will get same quantity of water, as of upstream canal farmers. Water for Animals is always available in canals in summer season. SCADA System for Gate operation with Control Room and Solar Energy Supply with remotely controlled by radio signals.

Need for studyThe Large network with 671 km of main canal network has to be designed with different Lengths of Pools at various split levels varying from 1 meter to 2 meter difference in bed levels, according to the outlets in their particular reaches and requirements of water and timing of operation.All the outlets of distributaries have to be designed for constant head to a minimum operating head.Time, and scheduling of opening and closing of the canal main gates, and water transfer, as well as filling time has to be stud