The Haean basin is a unique geographical feature formed by differential erosion and it borders the military demarcation line.
Recently the basin has become an interest of civilians due to security tour, highland vegetables and wetland. After the civil
war, the population decreased but it has increased since 2007. The annual mean air temperature in the basin has increased
with a rate of +0.016oC/yr and the annual precipitation also has increased with a rate of +10.41 mm/yr. The precipitation
occurring in June~August (wet season) occupied most of the total precipitation increase. In addition, recently the number of
groundwater wells and its use have gradually increased and most of them are for agriculture including cultivation of rice
and highland vegetables. If the air temperature further increases in the future according to the climate change scenarios, the
highland vegetables cultivation will be difficult. Furthermore, if the rainstorm in the summer will be enforced, the
groundwater recharge and water management will be aggravated. Therefore, an evaluation for sustainable groundwater
development in the basin and a reform of the current agriculture (change of cultivating crops) depending on much water are
essentially required.