Thanjavur, Tamil Nadu | Solar Pumps Tool Made with Humane Club

Thanjavur, Tamil Nadu

It has a relatively small proportion of its net sown area unirrigated, indicating poor irrigation demand. Overall, the water availability for irrigation in the district (based on ground water development and long-term trends of water level decline) is critical since the resource is overexploited, jeopardizing the long-term sustainability of solar pumps. The average monthly per capita expenditure of rural agricultural households is relatively high for the district, suggesting higher purchasing capacity of the farmers here. The number of medium and long-term institutional loans disbursed in the district is comparatively large, suggesting the availability of credit amongst farmers for potential investments. There is a comparatively high level of farm mechanization in the district, implying a positive outlook towards progressive technologies amongst the farmers. The district has a relatively high proportion of small and marginal farmers. The district appears in the group of districts, which are (very) highly vulnerable towards climate change, as per an index constructed by CRIDA.

Deployment Approaches

Approaches Feasibility
Individually owned off-grid solar pumps Limited Suitability
Solarisation of feeders Limited Suitability
Solar based water as a service Not Suitable
Promote 1 HP and sub-HP pumps Limited Suitability

Individually owned off-grid solar pumps

Limited Suitability

The district has a relatively high disbursement of institutional credit and high crop revenue per holding. However, ground water availability is below the safe limit, and concentration of diesel pump users is comparatively low, making it very difficult to promote the private ownership of solar pumps here.

Parameter Value Percentile
Number of cultivators reporting use of diesel pumps 12,425 45
Water Availability Index 0.21 16
Crop revenue per holding (INR) 145,758 74
Medium and long term institutional credit disbursed in a year (in INR Crore) 176.6 80

Solarisation of feeders

Limited Suitability

The district has a relatively high penetration of electric pumps, and its DISCOM has a rather high bulk power purchase rate, but the district has a comparatively low extent of feeder segregation. Solarisation of the feeders will only be possible once the district separates agricultural feeders from the rest.

Parameter Value Percentile
Power purchase rate for DISCOM (INR/kWh) 3.68 26
Extent of feeder segregation 0% 0
Proportion of cultivators reporting use of electric pumps 59% 94

Solar based water as a service

Not Suitable

The concentration of small and marginal farmers is rather high in the district, but groundwater availability is below the safe limit. In addition, a relatively low proportion of unirrigated area makes it very difficult to promote solar-based irrigation through the water-as-a-service model here, unless it undercuts the price of water from existing sources, and improves water utilisation through promotion of micro-irrigation.

Parameter Value Percentile
Water Availability Index 0.21 16
Proportion of small and marginal cultivators 93% 71
Unirrigated net sown area as a share of total net sown area 3% 8

Promote 1 HP and sub-HP pumps

Limited Suitability

The district has a relatively high proportion of gross cropped area under horticulture crops, a high concentration of marginal farmers and a comparatively high disbursement of institutional credit to marginal farmers, but groundwater availability is below the safe limit. Water conservation and efficient irrigation practices (such as drip irrigation) should be promoted to improve the viability of small capacity pumps.

Parameter Value Percentile
Area under horticulture crops as a share of gross cropped area 18% 75
Water Availability Index 0.21 16
Proportion of marginal cultivators 80% 76
Medium and long term institutional credit disbursed in a year (in INR Crore) 176.6 80

Leveraging Solar Pumps to Promote Policy Objectives

If you are deploying solar pumps in this district then you can further these policy objectives.

Climate Resilient Farming for Small Farms

Given the high concentration of small and marginal farmers—the most vulnerable group to climate change—and a high score on climate change vulnerability index provided by CRIDA*, the district is suitable for promoting climate resilient farming for small-sized farms. Solar pumps would assist in the same through low-carbon agriculture.

Parameter Value Percentile
Proportion of small and marginal cultivators 93% 71
Score on Climate Change Vulnerability Index 0.46 59

Per Drop More Crop

In the district, crops suitable for drip and sprinkler irrigation occupy a relatively high proportion of gross cropped area, making it easy to adopt such high precision irrigation methods. Solar pumps, along with other efficient and precise water application devices, could be deployed under Per Drop More Crop to promote efficient irrigation.

Parameter Value Percentile
Area under crops suitable for drip and sprinkler irrigation as a share of total cropped area 27% 57

Thanjavur, Tamil Nadu
Summary
Number of operational holdings
292,317
Average size of operational holding (Ha)
0.75
No. of cultivators using diesel pumps
12,425
No. of cultivators using electric pumps
172,344
Parameters (value, percentile)
Unirrigated net sown area ('000 ha)
6
12
Area under horticulture crops as a share of gross cropped area
18%
75
Water Availability Index
0.21
16
Monthly per capita expenditure of rural agricultural households (INR)
3,014
98
Crop revenue per holding (INR)
145,758
74
No. of rural and semi-urban bank branches per 10,000 farmers
8.14
57
Medium and long-term institutional credit disbursed in a year (in INR Crore)
176.6
80
No. of calls made at Kisan Call Centre (between 1.1.2011 - 31.12.2015)
2,106
65
Level of farm mechanisation (tractors, harvesters, threshers per ha)
0.81
85