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Tree plantation such as tea and rubber plantation cause low rates of soil erosion. Higher rates of soil erosion are caused by crops which are harvested annually like potatoes, most vegetables and tobacco. [11] Soil degradation in the dry zone leads to desertification. The loss of soil also is a big problem near watersheds, because a lot of ...
The Civil War in Sri Lanka arose from ethnic tensions between the Sinhala people and the Tamil minority. The Liberation Tigers of Tamil Eelam also known LTTE stopped cutting trees in the areas they occupied because the trees provided them with leaves that allowed them to practice guerilla warfare. In response, the opposition - the national ...
Sinhala: Maha rawana revula, Tamil: Ravannan meesai (Spinifex littoreus) The vegetation gradually become stable a distance away from the tide mark, with the stabilization of the soil. In these areas plant species such as, Sinhala: Wara, Tamil: Erukkalau (Calotropis gigantea) Sinhala: Wetakeiya, Tamil: Talai (Pandanus spp.) [11]
According to the U.N. FAO, 28.8% of Sri Lanka was forested in 2010 (about 1,86 million hectares). In 1995, it was 1.94 million hectares or 32.2% [11] of the land area that was classified as dense forests while the balance 0.47 million hectares or 7% the land area classified as open forests.
This also helped to prevent the soil erosion caused by burning of the Thalawa grassland by the villagers. The protected areas established in 1954 are Gal Oya National Park, Senanayake Samudraya Sanctuary, Gal Oya valley north-east Sanctuary, and Gal Oya valley south-east Sanctuary.
[34] [35] There is growing evidence that tillage erosion is a major soil erosion process in agricultural lands, surpassing water and wind erosion in many fields all around the world, especially on sloping and hilly lands [36] [37] [38] A signature spatial pattern of soil erosion shown in many water erosion handbooks and pamphlets, the eroded ...
As the weathered bedrock turns to soil, there is a greater elevation difference between the soil level and the hard bedrock. With the introduction of water and the thick soil, there is less cohesion and the soil flows out in a landslide. With every landslide more bedrock is scoured out and the hollow becomes deeper.
Chena is the oldest cultivation method in Sri Lanka, it goes far back as more than 5,000 years.(Before the Anuradhapura Kingdom) [1] [2] it the dry zone, the recovery of a chena plot proceeds through various stages of succession, (active chena, abandoned chena, chena re-growth, scrub with pioneer three species, scrub with secondary tree species, secondary forest, secondary forest with primary ...