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Quantitative evaluation of environmental loss and gain of forest and agriculture area were analyzed from the large-scale water development project in Thailand, The Increasing Volume of Water of Mae Kuang Project. It was found that after the project was completed, forest land will be increased and remove carbon dioxide in the atmosphere for about 7,106 tCO2e. Ecological footprints in forest areas found footprints in the uptake of carbon dioxide from the reforestation areas have increased for about 1,476 haG. Agriculture land will be increased and remove carbon dioxide in the atmosphere for about 42,087 tCO2e. Ecological footprints in the uptake of carbon dioxide from the agriculture areas have increased for about 2,834 haG. In terms of ecological footprints, about 4 and 11.27 times better use of land due to more forest area and better irrigation. From this study, it was found that footprints in forest and agriculture areas have a more positive impact than a negative impact. If construction is completed with better water management and able to deliver water to irrigation areas which helps increase the chances of absorbing more carbon dioxide from plants that can be cultivated throughout the year.
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