2024, Vol. 7, Special Issue 1

author(s)
Akshay Kulkarni, Madan Pendke, Papita Gourkhede and Bhaskar Bhuibhar

abstract
The standardization of rainwater harvesting structures (farm pond) in India takes into account the unique climatic conditions, agricultural practices, and socio-economic factors prevalent in different districts. This process involves the development of guidelines and recommendations based on scientific research, practical experiences, and lessons learned from successful implementations. In conclusion, the standardization of small water harvesting structures for districts under changing climate in India is a critical approach to address the water management challenges in agriculture. The rainfall data was collected from the Agro-meteorological station. Runoff was estimated using SCS curve number method considering the all parameters like soil type, vegetation etc. The rainfall runoff relationship was worked out for further planning of small water harvesting structures like farm ponds. Rainfall and runoff are significant constitute the sources of water for recharge of ground water in the watershed. Estimation of runoff in a watershed is very important to manage the water resources efficiently. The runoff potential for Dharashiv station was found to be 20.07%, indicating a good scope for rainwater harvesting and thereby, many more rainwater harvesting structures can be constructed based on site specific conditions. A relation between rainfall and runoff for Dharashiv station was worked out as Y = 0.423X – 140.4 (R² value -0.808). The derived linear rainfall-runoff relation may be used to determine the runoff associated with any rainfall that takes place in the region. The link between rainfall and runoff will be helpful in determining the possibility for collecting rainwater and reusing it to increase the yield of different types of crops that get rain. Farm pond sizes of storage capacity of 351cum 741 cum and 939 cum are standardized for catchment area of 1 ha, 2 ha and 3 ha respectively for Dharashiv station under changing climatic condition. Based on storage capacity, the square shaped farm ponds of sizes 15 x 15 m, 20 x 20 m and 22 x 22 m (top dimensions) with depth of 3 m and side slope of 1.5:1 (Trapezoidal shape) are suggested.