1. Photo: David Brazier/IWMI Photo :Tom van Cakenberghe/IWMI www.iwmi.org Water for a food-secure world K.Palanisami Drivers of canal irrigation performance: Use of Data and Measurement methods from Three major Projects in Tamil Nadu, India

2. www.iwmi.org Water for a food-secure world Fig 1:Schematic framework of methodology Performance Indices (based on review & consultation Data CollectionQuantification & analysis of IndicesLinking the indices with performance Identification of drivers of success of canal irrigation

3. www.iwmi.org Water for a food-secure world Fig 2. Location of the Projects Parambikulam-Aliyar Project Lower Bhavani ProjectTambraparani Project

4. www.iwmi.org Water for a food-secure world Performance measures and Drivers (1995-2010) No.ParticularsPAP (172256 ha)LBP (83980 ha)TP (138616 ha) 1Performance measures 1.1% of target area irrigated978976 1.2Water productivity ( kg/m 3 ) Rice0.430.420.44 Sugarcane8.9012.0- Coconut (nuts/ m 3 )3.76 2 -1.39 Maize3.983.45- Groundnut1.131.460.54 Cotton0.40-0.31 1.3Average profit ( Rs/ha)309321932710940 1.4Average profit ( Rs/m 3 ) 4.73.81.8 2Possible drivers 2.1Water availability( m 3 /ha)102481294011624 2.2% of WD met by canal supply41.654.433.9 2.3% of WD met by ER16.020.014.2 2.4% of WD met by GW42.325.551.8 2.5% area under water saving methods42.87.111 2.6% of water saving using WSIT194.82.7 Water allocation patternTurn Conti 2.8Water availability index7.37.84.6 2.9Ratio of rice and non-rice crops1:2.91:1.32:1 2.10Best performing WUA (% )32459 Data analysed : 1995-2010

5. www.iwmi.org Water for a food-secure world Performance of the Projects S.No.ProjectsTFP changeRemarks 1LBP 0.996 DEA-Malmquist approach 2PAP 0.935 3TP 0.889

6. www.iwmi.org Water for a food-secure world TFP River Basins

7. www.iwmi.org Water for a food-secure world Drivers of canal irrigation performance (% area irrigated) using Generalised Linear Model ProjectVariableNature of effect LBP water allocation index Positive water availability index Positive % Area under water saving tech Negative PAP RainfallPositive Percentage canal water supplyNegative Percentage ground water supplyPositive water allocation indexNegative water availability indexPositive Percentage crop diversificationNegative Percentage Area under water saving techPositive Percentage O&M staff increasePositive TP Percentage ground water supplyPositive water allocation indexNegative water availability indexNegative Percentage crop diversificationPositive Percentage Active WUAPositive Percentage O&M staff increasePositive

8. www.iwmi.org Water for a food-secure world Possible Follow ups Selection of the region/state Collection of data for all the M&M projects Derive various indicators Run the models Identify and rank the key drivers

9. www.iwmi.org Water for a food-secure world Thank you