Abstract
Groundwater and surface waterare widely utilized as a water resource in the Ayeyarwady River Delta but there are some chemical problems in the middle part of the study area. It is important to make clear the actual conditions of physical and chemical characteristics of groundwater in this delta. Database of the water samples for the the middle Part of the Ayeyarwady Delta were collected from 06th to 09th January 2010. Most water samples were taken with a bucket the surface water from wells, reservoirs and rivers. We were measured through EC and pH in the field and iron concentrations, isotopic and deuterium composition of all water samples are analyzed. Chemical water analysis included the determination of PO4, NO2, Br, NO3, SO4, HCO3, NH4, K, Mg, Cl, Na, EC, pH, 18O and tritium isotopes. The regional water quality of the middle Part of the Ayeyarwady Delta was mapped for key inorganic chemical determinants using a GIS System and Field Survey database. Integration of water data and GIS maps for all parameters revealed that there is probably no drinking water in Ayeyarwady Delta according to the WHO standards. Some determinants also exhibit localized high concentrations related to poor in drainage conditions with flood plains and small lakes as well as swampy areas, soil pollution caused by past land use, bedrock geology, and the agricultural use of fertilizers and the ingression of seawater into the estuary. The resultant maps revealed the major factors affecting the general characteristics of regional water quality.
