**4.8 Water level variation between pre-monsoon (may 2021) and post-monsoon (Nov.2021)**

The water level variation between the pre-monsoon and the post-monsoon season was also analyzed to study the consequence of the rainfall on the water level scenario. It is noticed that the entire area shows a rise in water levels in the post-monsoon season due to recharge from monsoon rainfall. The minimal water level variation of 0.10 m was observed in various parts of the Baglan, Nandgaon, Niphad, and Trimbakeshwar blocks, while the maximal water level variation of 12.35 m was measured at Visapur, Yevla block. The major part of the area shows the water level variation from 2 to 5 m followed by 5–10 m.

#### **4.9 Pre-monsoon depth to water level (may 2021) of deeper aquifer**

Pre-monsoon depth to the water level in Nashik district during May 2021 ranges from 8.76 m bgl (Hingalwadibk, Kalwan block) to 123.5 m bgl (Kaluste, Igatpuri block). The pre-monsoon depth to water level map for Aquifer -II presented in **Figure 17** indicates that the depth to the water level of less than 10 m bgl is observed in mainly Surgana, Peth and small isolated patches in Klawan and Dindori blocks covering an area of 626 Sq.km. The major parts of Peth, Dindori, Kalwan, and Baglan blocks and small isolated patches in Yevla, Niphad, Nashik, and Trambakeshwar show depth to water level between 10 and 20 m bgl covering an area of 2855.37 Sq.km. The deeper water level of more than 50 m bgl is observed in major parts of the district in Igatpuri, Sinnar, Nashik, Trambakeshwar, Niphad, Nandgaon, Malegaon, Deola, and Chandwad blocks covering an area of 7097.14 Sq.km. This may be due to the overexploitation of groundwater and it also indicates that the shallow aquifer is not able to sustain the demand; hence, groundwater resources are being also withdrawn from deeper aquifers in this area.

#### **4.10 Post-monsoon depth to water level (Nov 2021) of deeper aquifer**

In Aquifer-II, the post-monsoon depth to water level in Nashik district during Nov. 2021 ranges between 3.9 m bgl (Sinnar, Sinnar block) and 71.6 m bgl (Sakore, Nandgaon block). The post-monsoon depth to water level for Aquifer -II is given in **Figure 18** and it shows that the depth to water level of less than 10 m bgl has been demarcated in Peth, Surgana, Nashik, Dindori, and parts of Niphad, Sinnar, Kalwan, and Trambakeshwar blocks covering an area of 3647.15 Sq.km. Depth to water level between 10 m bgl to 20 m bgl has been observed in the major part of the district covering an area of 4381.61 Sq.km. Southern parts of the district near Sinnarand eastern parts of the district near Nandgaonshow the deepest water level of more than 50 m bgl covering an area of 2348.13 Sq.km. Deeper water levels between 20 and 50 m *Management of Hard Rock Basaltic Aquifer through Aquifer Mapping: A Case Study of Nashik… DOI: http://dx.doi.org/10.5772/intechopen.111644*

**Figure 17.**

*Pre-monsoon depth to water level of deeper aquifer.*

bgl are observed in the central-eastern parts of the district near Baglan and Chandvad and also in the south-western parts of the districts.
