Topography of the mutt land and the surroundings have gentle, a tank can be constructed at the site as specified at location in figure 3. Probable size of the tank is as specified in figure 4, area of the tank is nearly 6000 square meters (1.5 acres). The catchment area (Figure 5) of the proposed tank is nearly 37.41 hectares. Landscape dynamics in the catchment since early 2000’s till date is as given in figure 5. With rainfall of 4200 mm per year, yield in the catchment is nearly 785 kilo. cum (785 million liters).

Figure 3: Topography of the terrain (1m contour) – indicating location of proposed tank

Figure 4: Possible tank area (cyan)

2004	2010
2016

Figure 5: Landscape dynamics in the catchment.

An Artificial Pond can be excavated and built with a water spread area of 6000 sq.m. The side walls can be constructed using stone masonry.

Case 1: Various depths, having constant surface area

Figure 6 depicts the design of pond with a constant surface area of 6000 sq.m with variable depth d, Table1 depicts the variability in storage volume with increasing depths of the pond.

Figure 6: Case 1, Pond having a constant surface are with variable depth (d).

Table 1: Storage capacity of Pond at various depths

Case 2: Pond Built as Kalyani

Figure 7 depicts the design of pond if built as a Kalyani, and table 2 depicts the volume stored at various depths, for every 1 meter depth, 3 meter wide banking is considered on each side of the pond.

Figure 7: Case 1, Pond having a constant surface are with variable depth (d).

Table 7: Storage capacity of Pond as Kalyani

Note: in both the cases, Natural subsurface flows (pipe flows) should not be altered as it functions in catering water to downstream users