Si Lanna National Park is a protected area located in the Chiang Mai Province of northern Thailand. Established in 1989 as the country's 58th national park, it encompasses approximately 1,406 square kilometers (543 square miles) across the districts of Mae Taeng, Chiang Dao, and Phrao. The park is characterized by its rugged mountainous terrain and serves as a significant watershed for the Ping River.
Geography and Topography
The park's landscape is dominated by the Thanon Thong Chai Range, with elevations ranging from approximately 400 to over 1,700 meters above sea level. The topography consists of steep mountain ridges and deep valleys. A central feature of the park is the Mae Ngat Somboon Chon Reservoir, a large body of water created by the damming of the Mae Ngat River. This reservoir facilitates irrigation, hydroelectric power generation, and local fisheries.
Flora and Fauna
The vegetation within Si Lanna National Park varies according to elevation and soil composition. The lower regions are primarily covered in deciduous forests, including mixed deciduous and deciduous dipterocarp forests. Higher elevations feature hill evergreen forests and pine forests. Notable tree species include teak and various species of Dipterocarpus.
The diverse habitats support a variety of wildlife. Mammals recorded in the area include barking deer (muntjac), wild boar, Malayan sun bears, and several species of primates such as macaques and gibbons. The park is also home to a wide array of avian species, including ospreys, kingfishers, and various forest birds, making it a site of interest for ornithological observation.
Hydrology and Climate
As a headwater source for the Ping River, the park plays a critical role in the regional hydrological cycle. The climate is tropical and influenced by seasonal monsoons. The rainy season typically occurs from May to October, while the cool, dry season lasts from November to February. During the hot season (March to April), temperatures can rise significantly, and the risk of forest fires increases.
Management and Conservation
The park is managed by the Department of National Parks, Wildlife and Plant Conservation (DNP) of Thailand. Management efforts focus on the protection of forest resources, the prevention of illegal logging and poaching, and the maintenance of the watershed. The Mae Ngat Somboon Chon Reservoir is also a focal point for regulated ecotourism, featuring floating accommodations and water-based activities.