Final answer:
The direction groundwater flows within a subsurface figure is determined by the slope of the water table indicating higher to lower elevation. Groundwater is a significant fresh water source, found in pore spaces or rock fissures, and can spread pollutants. A hydrogeologist may investigate potential aquifers by creating cross-sections from stratigraphic columns.
Step-by-step explanation:
The question pertains to the flow direction of groundwater within a subsurface material. Groundwater generally flows from areas of higher elevation to lower elevation, and thus, if we are given a figure with various locations, the location with groundwater flowing to the left would be determined by the slope of the water table or gradient shown on the figure, assuming left indicates a direction towards lower elevation.
To assist in understanding this concept, it is important to know that groundwater is a crucial reservoir of fresh water. It is found in spaces between sand and gravel particles or in rock fissures and it contributes to surface water bodies such as streams and lakes through seepage. Furthermore, groundwater flow can transmit pollutants over large areas, a significant concern for environmental protection and water quality management.
Related to hydrogeology, a hydrogeologist may create cross-sections based on stratigraphic columns to determine potential aquifers for well-drilling. Aquifers are large, sub-surface rock formations that hold water and can be accessed by drilling wells. The best aquifers consist of laterally continuous layers of sandstone due to their high porosity and permeability.
Maintaining the pre-development level of the water table in an area is critical to the local ecosystem, as significant changes can affect the water supply to surface water bodies like rivers and privately owned wells, impacting both humans and wildlife depending on this resource.