MDARD Michigan Core Pesticide Applicator Practice Exam

When are water table elevations generally at their highest?

1. During winter months

2. Spring and fall

3. Summer and autumn

4. Only during heavy rainfall

The correct answer is: Spring and fall

Water table elevations tend to be at their highest during the spring months. This is primarily due to the melting of snow and the increase in rainfall that is common in spring. As winter snowpack melts and rainfall increases, more water infiltrates the ground, replenishing groundwater supplies and thus raising the water table. In contrast, autumn can also contribute to higher water table levels as rainy weather can continue into that season, but the significant rise is most pronounced in spring. Summer and autumn generally see a decrease in water table levels due to increased evaporation and possibly lower precipitation levels, while winter months can be variable depending on snowfall but do not typically contribute significantly to water table elevation. Heavy rainfall alone may increase water table levels temporarily, but it is not the primary factor that consistently raises the water table, as it can vary greatly depending on the timing and amount of rainfall. Thus, the spring months are more reliable for observing elevated water table levels due to a combination of snowmelt and seasonal precipitation.