We need to match the terms in Column I with the suitable hydrometeorological variables in Column II. Let's go through each term:
P. Isopleth: refers to lines that connect points of equal value for a particular variable, often used for variables like temperature or evapotranspiration. In this case, Isopleth is most related to evapotranspiration. So, P matches with 3.
Q. Isobath: refers to lines connecting points of equal depth in water bodies, which is closely related to groundwater. Hence, Q matches with 4.
R. Isohyet: is a term used to describe lines connecting points of equal rainfall. Therefore, R matches with 1 (Rainfall).
S. Isochrone: refers to lines connecting points that have experienced a similar time period for a given process, often associated with surface runoff. Hence, S matches with 5.
T. Isobar: refers to lines of equal atmospheric pressure, so T matches with 2 (Pressure).
Thus, the correct match is: P-3, Q-4, R-1, S-5, T-2.