CAJ | 학술논문

三峡水库运行后，下泄泥沙量减少明显，对下游营养物质的连续传输产生影响。通过实验模拟了天然河流水沙条件下悬浮泥沙对磷的吸附过程，并利用Langmuir吸附公式对颗粒磷浓度与含沙量和溶解磷浓度的关系进行拟合。结果表明，泥沙对磷的吸附量与温度成正相关性、与粒径呈负相关性；三峡工程运行后近10 a，长江中下游输沙量和颗粒磷通量减少幅度达到90％；预测未来20 a长江中下游颗粒磷通量仍远低于建库前水平。针对三峡水库拦截泥沙和营养物质的问题，提出了三峡坝前挖沙坝后投沙的水沙调控新思路。
삼협수고운행후，하설니사량감소명현，대하유영양물질적련속전수산생영향。통과실험모의료천연하류수사조건하현부니사대린적흡부과정，병이용Langmuir흡부공식대과립린농도여함사량화용해린농도적관계진행의합。결과표명，니사대린적흡부량여온도성정상관성、여립경정부상관성；삼협공정운행후근10 a，장강중하유수사량화과립린통량감소폭도체도90％；예측미래20 a장강중하유과립린통량잉원저우건고전수평。침대삼협수고란절니사화영양물질적문제，제출료삼협패전알사패후투사적수사조공신사로。
Since-the-operation-of-Three-Gorges-Project-,-the-releasing-sediment-has-reduced-obviously-,-which-has-influenced-the-continuous-transport-of-nutrients-in-the-lower-reaches-.The-adsorption-process-of-phosphorus-by-suspended-sediment-under-the-nat--ural-flow-and-sediment-condition-was-simulated-through-experiment-,-and-the-relationship-of-particulate-phosphorus-concentration-and-sediment-concentration-and-dissolved-phosphorus-concentration-was-fitted-by-Langmuir-formula-.The-results-show-that-the-phosphorus-adsorbed-by-sediment-is-positively-correlated-with-temperature-,-and-negatively-correlated-with-particle-size-.Both-sedi-ment-discharge-and-particulate-phosphorus-flux-in-the-mid--lower-Yangtze-River-has-decreased-by90%for-nearly-10-years-since-the-operation-of-Three-Gorges-Project-.It-is-predicted-that-the-particulate-phosphorus-flux-is-still-far-below-the-previous-level-in-the-next-20-years.In-view-of-the-interception-of-sediment-and-nutrients-by-Three-Gorges-Reservoir-,-an-innovative-thought-of-regulating-the-flow-and-sediment,-namely,-dredging-the-sediment-at-upstream-of-the-dam-and-releasing-them-at-downstream-of-the-dam-,-is-proposed.