本研究在探討高屏溪河口區及river plume中顆粒態有機碳與無機碳之分佈與特性，並了解懸浮顆粒物質不同粒徑群分布及其葉綠素a濃度，進而了解河口區及river plume之潮汐動力影響。本研究所採集之懸浮顆粒樣品主要是利用Catnet多層網過濾裝置將不同顆粒粒徑之懸浮物質分離，並進行不同粒徑總懸浮顆粒物濃度、顆粒有機碳及無機碳以及葉綠素a之測定。
由5種懸浮顆粒粒徑群組（＞153、63-153、10-63、3-10及0.7-3 μm）之有機碳與無機碳含量分布，發現細顆粒（＜10 μm）群組中有機碳及無機碳均分別佔總量50％以上，顯示細顆粒含量為有機碳與無機碳濃度之主要控制因子。實驗結果證明有機碳及無機碳之主要載具為細顆粒，當細顆粒含量受環境因素影響時，將間接影響有機碳與無機碳之含量與分佈。
乾季各粒徑POC濃度明顯高於濕季，且乾季底層POC濃度高於表層，均是受高TSM所影響。兩季節表層與底層之各粒徑POC分佈也相同，主要粒徑群為細顆粒（＜10 μm），顯示水層中POC主要粒徑群未受季節性變化影響。兩季節各粒徑群之PIC濃度分布亦呈現乾季大於濕季，兩季節表層總PIC濃度皆高於底層，推測可能是PIC沉降過程中溶解作用所造成。PIC主要粒徑群亦是以細顆粒（＜10 μm）為主，且也未受季節影響。高屏溪河口及近岸TSM、POC、PIC之主要粒徑群皆屬於細顆粒群，懸浮顆粒的分佈型態深受潮汐作用影響，且主要粒徑群不受季節差異而改變。由此懸浮物質粒徑群特性可了解沉積物中TSM、POC及PIC之分布型態。

This study aims to investigate both the distribution and character of particulate organic carbon (PIC) and particulate inorganic carbon (PIC) in the suspended sediment in the Gaoping estuary and its river plume. Furthermore, this study aims to investigate the tidal influence in the estuary and its plume by studying the size of sediment and the concentration of chlorophyll-a. In this study, suspended sediment, is mainly collected by multi-sieve filter, Catnet, which is used for the determinations of sediment size, organic carbon, inorganic carbon, as well as chlorophyll-a.
The result shows that fine particle (<10 μm) contributes more than 50% of the total weight in 5 suspended sediment groups (>153, 63-153, 10-63, 3-10, and 0.7-3), indicating that the PIC and POC are mainly controlled by the amount of fine particle. This suggests that fine particle is the carrier of the PIC and the POC, thus distributions of PIC and POC will be influenced as concentrations of the fine particle is influenced by environmental factors.
In dry season, POC concentration is higher than in wet season; moreover, the concentration of POC beneath is higher than the surface, suggesting the influence of TSM. The distributions of suspended sediment are similar in both wet and dry seasons in size of <10 μm, indicating there is no seasonal influence in the size of suspended sediment in our study areas. The PIC concentration in dry season is higher than the wet seasons, where the surface PIC concentration is higher than the beneath concentration in both dry and wet seasons, suggesting dissolution of PIC during settle down. The PIC mainly contributes by the fine particle (<10 μm) which does not suffer any seasonal change. The TSM, POC, as well as PIC in suspended sediment in the Gaoping estuary and its plume are mainly contributed by fine particles. Distributions of these fine particles are highly influenced by the tides, but not the season changes. This study shows that the distributions of TSM, POC, as well as PIC in suspended sediments can be known through the characters of the suspended sediment.

致謝---------------------------------------------------------------------------------I
摘要--------------------------------------------------------------------------------II
ABSTRACT---------------------------------------------------------------------IV
目錄-------------------------------------------------------------------------------VI
圖目錄----------------------------------------------------------------------------IX
表目錄--------------------------------------------------------------------------XIII
第一章、緒論---------------------------------------------------------------------1
1-1前言----------------------------------------------------------------------1
1-2懸浮沉積物之物理特性----------------------------------------------2
1-3懸浮顆粒在河口環境中扮演的角色-------------------------------4
1-4沖淡水結構-------------------------------------------------------------5
1-5河流陸源物質輸出至最後堆積過程-------------------------------8
1-6前人研究---------------------------------------------------------------10
1-7研究目的---------------------------------------------------------------11第二章、研究區域--------------------------------------------------------------12
2-1高屏峽谷河海系統---------------------------------------------------12
2-1-1高屏溪河口-----------------------------------------------------12
2-1-2高屏峽谷--------------------------------------------------------13第三章、材料及方法-----------------------------------------------------------15
3-1採樣時間、位置及方法----------------------------------------------15 3-2基本水文參數---------------------------------------------------------17
3-3不同粒徑之懸浮顆粒樣品------------------------------------------18
3-4 總懸浮顆粒物濃度之測定-----------------------------------------19
3-5顆粒態有機碳之測定------------------------------------------------19
3-6葉綠素a之測定------------------------------------------------------20
第四章、結果與討論------------------------------------------------------------21
4-1高屏海域水文環境---------------------------------------------------21
4-2潮汐對總懸浮物質、顆粒態有機碳與無機碳濃度之影響--------------------------------------------------------------------------------24
4-2-1河口區大潮期間TSM、POC、PIC及Chl-a之時序分布
---------------------------------------------------------------------------24
4-2-2河口區小潮期間TSM、POC、PIC及Chl-a之時序分布
---------------------------------------------------------------------------37
4-3高屏溪沖淡水連續24小時水動力之觀測-----------------------50
4-4漲退潮期間定點觀測------------------------------------------------54
4-5探討大、小潮之間的差異與比較河口區與沖水區之不同 --------------------------------------------------------------------------67
4-6不同粒徑群懸浮顆粒之有機碳及無機碳於乾濕兩季觀測--------------------------------------------------------------------------------73
第五章、結論--------------------------------------------------------------------77參考文獻--------------------------------------------------------------------------79

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