ALL IN A DAY’S HYDROGEOLOGY FIELD WORK
The water chemistry shows that most of the ponds within the marsh have neutral pH, low conductivity, and low nitrate except for drainage ditch where the nitrate level was 18 ppm, above the 10ppm upper limit for drinking water standard. Seepage measurement and minipiezometers indicate groundwater recharge within the pond, that is, the marsh is losing water. Seepage velocity from seepage meter was 1.177 x 10-3 cm/sec (6.18 m/yr.). The constructed well field was not successful even after three attempts. Analyses of soil samples indicate that the soil is the silty clay type. There is a strong positive correlation (r=0.999) between hydraulic conductivity and TDS as should be expected. Also, DO has a strong negative correlation with temperature (r=-0.939). In-spite of the failure of the permeameter and well nest, the weekend fieldwork demonstrated field techniques to students and how instruments discussed in lecture were used. The failure of equipment or method is also a learning experience of itself.