ZAPATA has extensive experience in groundwater resource exploration and delineation, seawater intrusion mapping, and contamination and pathway mapping. Additionally, ZAPATA has conducted surface water investigations using bathymetric, sidescan sonar, and sub-bottom profiling methods.
ZAPATA conducted surface geophysical surveys for groundwater investigations at the South Platte Wellfield Development Project near Brighton, Colorado. The main objectives were to map subsurface geologic formations and features (i.e. channels) that are important in controlling the occurrence of groundwater, particularly the depth to bedrock shale, and the potential of overlying alluvial sediments for groundwater resources. Both Frequency Domain Electromagnetic profiling and Time Domain EM sounding methods were employed.
ZAPATA carried out surface Time Domain Electromagnetic (TDEM) geophysical surveys for groundwater resource evaluation at the North Well Field on Waikoloa Land Company property located on the Island of Hawaii. The main objective of the TDEM surveys was to explore for additional basal groundwater occurrences at the North Well Field site. The surveys were conducted at six TDEM sites to help determine the optimum location for future groundwater wells located above Waikoloa Village. Optimum locations for groundwater in the basal mode are expected to occur where the thickest lens of fresh-brackish water is detected floating on seawater.
