| 长江河口营养物质输送的组成与通量 |
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| 引用本文： | 章申,季宏兵,晏维金,DUAN Shuiwang.长江河口营养物质输送的组成与通量[J].地理学报(英文版),2003,13(1):3-12. |
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| 作者姓名： | 章申 季宏兵 晏维金 DUAN Shuiwang |
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| 作者单位： | Inst. of Geographic Sciences and Natural Resources Research，Beijing 100101，China |
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| 基金项目： | National Natural Science Foundation of China,No.39790110 |
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| 摘 要： | 1IntroductionRiversplayanimportantroleintransportofnutrients(e.g.,NandP)andtheirbiogeochemicalcyclinginland-oceaninteractionsystem.Forexample,humanactivitieshaveresultedinaboutthesameamountofnitrogenfixation(140×106t)oncontinentsasthatofnaturethroughfertilizerproduction,energyproductionandcultivationofcrops,or30%ofthetotalamounttransportedtooceansbyrivers(Gallowayetal.,1995).Thefluxesofdissolvedphosphorusfromlandtoseasurfacecarriedbyriverrunoffasorthophosphateisabout2TgPyear-1(1Tg=1×1012g)…
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| 收稿时间： | 6 July 2002 |
| 修稿时间： | 23 November 2002 |
Composition and flux of nutrients transport to the Changjiang Estuary |
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| ZHANG Shen,Ji Hongbing,YAN Weijin,DUAN Shuiwang.Composition and flux of nutrients transport to the Changjiang Estuary[J].Journal of Geographical Sciences,2003,13(1):3-12. |
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| Authors: | ZHANG Shen Ji Hongbing YAN Weijin DUAN Shuiwang |
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| Institution: | Inst. of Geographic Sciences and Natural Resources Research, Beijing 100101, China |
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| Abstract: | Based on the results of water sample measurements of nutrient concentrations at th e Datong Station of the Changjiang River from 1998 to 1999, combined w ith historical data of water quality, seasonal variations of nutrient concentrations and nutrient transports are discussed.The following results have been obtained: (1) the fluxes of the nitrate nitrogen, ammonium nitrogen and nitrite nitrogen increased by time-series from 1962 to 1990 , even if runoff volume had a little variation; (2) the concentrations and fluxes of the dissolved inorganic nitrogen (DIN) and dissolved in organic phosphorus (DIP) increased notably with time, but those of the dissolved silicon (DSI) decreased pronouncedly; and (3) the concentration s and fluxes changed synchronously with time between the Datong Station a nd the Changjiang Estuary. |
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| Keywords: | Changjiang Estuary nutrient seasonal varia tion forms temporal and spatial trends |
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