Contemporary changes in open water surface area of Lake Inle, Myanmar
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From 1935 to 2000, the net open water area of Inle Lake in Central Shan State, Myanmar decreased from 69.10 to 46.69 km2, a loss of 32.4% during this 65-year period. Local beliefs are that losses in lake area have been even greater within the last 100–200 years. Various activities, including timber removal, shifting agriculture in the uplands by various ethnic groups, and unsustainable cultivation practices on the low- and mid-level hillslopes around the lake, have been blamed for both historical and ongoing sedimentation. We take issue with attributing loss of lake area to these activities, and propose instead that ongoing “in-lake” and “near-lake” agricultural practices are the main sources of contemporary sediment and loss of open water area. About 93% (i.e., 20.84 km2) of the recent loss in open water area of the lake is due to the development of floating garden agriculture, largely along the west side of the lake. Direct environmental impacts associated with this practice and with other agriculture activities within the wetlands and margins of the lake include sedimentation, eutrophication, and pollution. Whilst the sustainability of hillslope agriculture and past forestry practices can indeed be questioned, a more urgent need is to address these "in-lake" and "near-lake" practices.
KeywordsSedimentation Erosion Floating gardens Shifting cultivation Deforestation Tourism
This study was supported by grants to Roy C. Sidle from the National University of Singapore (grant #R−109-000-031-112) and the Japan Society for Promotion of Science (JSPS) (grant #16380102), as well as the JSPS Fellowship that supported Alan D. Ziegler. We thank the following for their assistance during our work at Inle Lake and/or for introducing us to the area: U Mehm Ko Ko Gyi, Takahisa Furuichi, Khaing Wah Wah Maw, Karin Laursen, and U Than The.
- Asian Development Bank (2006) Myanmar case studies: (1) environmental performance in Mandalay City; (2) environmental performance assessment of Inlay Lake, ADB T.A. No. 6069-REG, prepared by National Comm. Environ. Affairs, Myanmar and Project Secretariat UNEP Regional Resource Ctr. for Asia and the PacificGoogle Scholar
- Couchman HJ (1937) One inch sheet (1:63,360) 93 D/14, 1st edn, Southern Shan States, Burma, surveyed 1935–1936, published under the direction of Surveyor General of India (restricted)Google Scholar
- Kashio M (2000) Back-to-office report, 21–29 November 2000 Yangoon and Shan State, Myanmar visit, FAO/RAP, BangkokGoogle Scholar
- Lewis CG (1938) One inch sheet (1:63,360) 93 D/15, 1st edn, Southern Shan States, Burma, surveyed 1936–1937, published under the direction of Surveyor General of India (restricted)Google Scholar
- Marshall H (1999) Consultancy mission report on natural resources management. UNDP/FAO Consultancy Mission Rep. SPPD - DP/MYA/98/003. FAO, BangkokGoogle Scholar
- Myo Myint (2000) Report of study on pesticide use control in Inle Lake. UNDP/FAO Report MYA/99/007, YangonGoogle Scholar
- Ngwe Sint U, Catalan I (2000) Preliminary survey on potentiality of reforestation under clean development mechanism in Myanmar with particular reference to Inle region. Unpublished report by Karamosia Intl., YangoonGoogle Scholar
- Spencer J (1966) Shifting cultivation in Southeast Asia. University of California Publications in Geography, vol 19, University of California Press, BerkeleyGoogle Scholar
- Vigny C, Socquet A, Rangin C, Chamot-Rooke N, Pubellier M, Bouin M-N, Bertrand G, Becker M (2003) Present-day crustal deformation around Sagaing fault, Myanmar. J Geophys Res 108(B11):2533, doi:10.1029/2002JB001999Google Scholar
- Volk P, Heymann J, Saradeth S, Bechstedt HD, Löffler E, Stuurman W, Aiblinger S, Carl S, Küpper A, Lamprecht S, Ringenberg, H, Schönberg A (1996) Mapping and land use planning for watershed management. Final report for the government of Myanmar, Ministry of Forestry, GAF, MunichGoogle Scholar