Results (
Thai) 2:
[Copy]Copied!
The site is equipped with observation wells that allow sampling at different depths and distances from the river. The wells are lined with hard PVC pipes (diameter 5 cm). Figure 1 shows the situation of the site with the wells used in this study. The aquifer consists of three layers. The top layer is freshly infiltrated river water , the middle layer is water that was infiltrated upstream of the test site, and the lower layer consists of groundwater that is not affected by infiltration.
Samples were collected from the river and from the groundwater wells in March and July 1195. Sample from the river were taken by a 4900 portable contaminant sampler from Manning Products. The sampler was cleaned by pumping for at least 20 cycles 0.01 M HNO3 through the tube. The bottles were soakes for 48 h in 0.01 M HNO3 and rinsed with Nanopure water. The stainless steel end of the tube was removed, and the end was fixed on a stone to hold the inflow under water.
Being translated, please wait..
