Terrestrial and aquatic mercury biogeochemical processes are integrated into the Soil and Water Assessment Tool (SWAT) to simulate the watershed scale Hg behaviors. The SWAT-Hg was successfully calibrated and validated with the data obtained from the Jang-Sung Dam (JSD) watershed. The largest Hg storage in the watershed was found in soil (93%), however, soil erosion was not the largest Hg source for the JSD reservoir due to the well-established forests. The model suggests the baseflow is the most dominant Hg loading to the waterbody, which accounts for 80.0% of the THg yields on the annual basis. The model simulation was projected to the year 2040 and showed that the Hg levels in various compartments of watershed have not reached to steady state, hence the Hg levels changed slowly over the decades even in status quo atmospheric Hg deposition.

陆生和水生汞生物地球化学过程已集成到土壤和水评估工具（SWAT）中，以模拟流域尺度的汞行为。利用从张成水坝（JSD）流域获得的数据，成功地对SWAT-Hg进行了校准和验证。流域中最大的Hg储量存在于土壤中（93％），但是，由于森林条件完善，土壤侵蚀并不是JSD水库的最大Hg源。该模型表明，基流是水体中最主要的Hg负载量，占每年THg产量的80.0％。该模型模拟预计在2040年进行，结果表明流域各个隔间的汞含量尚未达到稳定状态，因此即使在现状下，汞含量在过去的几十年中变化缓慢 大气中的汞沉积。