OZCAR-RI M-TROPICS/MSEC, Huay Ma Nai, Thailand - Thailand

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OZCAR-RI M-TROPICS/MSEC, Huay Ma Nai, Thailand

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Huai Ma Nai is a small agricultural catchment (93 ha) of northern Thailand, 60 km from the city of Phrae, in a sloping land environment where has been monitored since 2001 the impacts of land use changes, from mung bean and soya bean to maize, upron hydrologic and sedimentary budgets. Agricultural practices are very intensive, base on high quantity of fertilizers, herbicides and pesticides. Cultivation is mechanized. The mean slope is 12.9%%. Soils are thin Alfisols and Ultisols with sandy clay loam to clayey texture, high coarse fragment content, low pH, high bulk density and low-medium cation exchange capacity. Equipments include an automatic meterological station since 2001, 3 weirs and 1 flume to monitor discharge from nested catchments, suspended and bedload since 2001, automatic suspended load samplers. This catchment is part of the larger Mae Thang catchment (120 km²) that supplies water to a reservoir which has been built in 1995 and monitored since 2001. More information available on http://www.msec3.net/portal/, and in Valentin et al. (2008), AGEE; Huon et al.(2011), AGEE. The Huai Ma Nai catchment belongs to the MultiScale Environmental Changes Network (MSEC) which is a long term monitoring network of experimental catchments in South-East Asia (Laos, Thailand, Vietnam) and to the French SOERE-RBV Network. It serves as experimental site for three projects funded by the French Agency for Research (ANR).

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The objectives of this MSEC site are fivefold: (i) monitor the impact of land use change and possible climate change upon the hydrologic and sedimentary responses at various scales from micro-plots (1 m²) under natural or simulated rainfall to micro-catchments (0.6 ha) and larger catchments (up to 60 ha); 'ii) conduct experiments on new agricultural practices and their impacts on hydrology, carbon, nutrients, pollution and erosion; (iii) provide sound data to the scientific community and to decision makers to improve land management of steep slope environment in South-East Asia; (iv) develop and test generic hydrologic and erosion models; (v) to train young scientists and students from a very wide array of disciplines.

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Latitude: 18.230720000000
Longitude: 100.389330000000