This lecture proceeds the previous by emphasizing the importance of identifying basin boundaries for quantitative groundwater evaluation. It discusses how geomorphological and geological analyses, including morphometric assessments and understanding aquifer dips, are essential in predicting groundwater divides and subsurface flow. The lecture highlights the role of remote sensing in mapping fracture patterns, which affect groundwater accumulation and flow in hard rocks. Additionally, it covers the significance of joint sets and their properties in determining suitable locations for groundwater wells. The interplay of geological structures such as folds, faults, and fractures, as well as their influence on groundwater movement and storage, is also elaborated upon.