| Summary: | 碩士 === 中國文化大學 === 化學系應用化學碩士班 === 102 === The research area is in Neishuangxi River Basin in this study, it is belonged to the subtropical broadleaf forest ecosystem, the wet season of plum rain and typhoon will bring heavy rain from May to October in this region, and the strong northeast monsoon in September carries large amounts of suspended particles into the basin during the wet season. Samples are taken once every month from June of 2012 to September of 2013. Phosphate and silicate are measured and analyzed by using spectroscopic analyzer. Phosphate content is affected by dry season and wet season in alternation, phosphate concentration will be lower when typhoon arrives.
The climate, rainfall, drainage area and human cultivation all affected the river outputs.Typhoons affected Taiwan during sampling period were typhoon Talim on June 21, typhoon Soala on August 2 and typhoon Tembin on August 22 in 2012, and typhoon Soulik on July 11, typhoon Kong-rei on August 20 and typhoon Trami on August 27in 2013.And due to lots of rain water were entrained by typhoon, there will be a dilution effect, in June and August of 2012 and in September of 2013,strong northeast monsoon brought into lots of suspended solids,and leading to the phosphate concentration in the streamwater increased obviously.
Silicate was affected by weathering of rocks, silicon concentration was scoured off by scrubbing and leaching of rain water on weathered rocks and the silicon concentration was almost within 7 and 1000μM.
Inorganic carbon
Dissolved Inorganic Carbon (DIC) mainly comes from CO2, and carbonate salts in the atmosphere, it mainly includes CO2, CO3 2- and HCO3 -. Main formation processes of dissolved inorganic carbon (DIC) are rock weathering, decomposition of soil organic matters and cellular respiration of aquatic organisms.
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