page_title: Gotjawal Forest
section_title: Rain water penetrating to the groundwater aquifer
hierarchical_section_title: Gotjawal Forest / Features / Rain water penetrating to the groundwater aquifer
caption_attribution_description: English: Pond in Gotjawal Forest
context_page_description: Gotjawal Forest is a naturally formed forest located on the middle slopes of Halla Mountain, Jeju Island in South Korea. It covers the rocky area of ʻaʻā on Jeju Island off the southwestern coast of South Korea. Due to the geographical feature, the region remains largely undisturbed by people. The Gotjawal Forest is an enclave of the Southern Korea evergreen forests ecoregion, and is a favorite place of the Jeju locals.
context_section_description: 46% of all rainwater falling on Jeju Island in the Gotjawal forest's areas permeates through the lava and soil into the groundwater's aquifers, via lava structures such as lava tubes, skylights, clinkers, and cracks; structures typically found in ʻAʻā lava. This is the highest rainwater percolation and groundwater recharge rate in South Korea.
  The Gotjawal forest's canopies diffusing raindrops and surface plant litter reducing runoff and increasing initial absorption contribute to the high groundwater absorption rate of rainwater. There are few rivers on the forested west or east of the island because almost all the rainwater is drawn directly into the groundwater. By comparison the north and south of Jeju Island has many small rivers.
caption: Gotjawal Forest pond
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