The following details are shown in the hydrological map overlay (Figure 8.6) -
• Canal / tank commands
• Groundwater irrigated areas
• Well observation data collected in the field and Govt. Depts
• Rain gauge stations indicating average annual rainfall. In case of absence of rain gauge station in a Toposheet, average annual rainfall in mm shall be given in the legend. Source of rainfall data shall be either IMD or District Gazetteer.