CAJ | 학술논문

根据走马塘拓浚工程实施前后的地形变化，建立拓浚河道平面二维水动力数学模型，模拟河道拓浚前后走马塘典型河段的水动力变化情况，并分析拓浚工程对河道水动力特征的影响和拓浚工程的水生态效应。结果表明，拓浚工程的实施使得区域流速及断面横向流速分布变得均匀，对水环境改善有一定的正效应；河道拓浚工程的实施，短期内有利于浮游植物生长，但对浮游动物的生长有一定抑制作用，而从长期影响结果趋势来看，拓浚工程有利于水生生境系统的恢复与重建；河道拓浚工程的实施有利于底泥质量的改善，减少底泥污染物的含量，减少河道内源释放，对水质改善有正面效应；拓浚工程对底栖生物生境具有严重影响，但是随着时间的推移，底栖生境将会重建。
근거주마당탁준공정실시전후적지형변화，건립탁준하도평면이유수동력수학모형，모의하도탁준전후주마당전형하단적수동력변화정황，병분석탁준공정대하도수동력특정적영향화탁준공정적수생태효응。결과표명，탁준공정적실시사득구역류속급단면횡향류속분포변득균균，대수배경개선유일정적정효응；하도탁준공정적실시，단기내유리우부유식물생장，단대부유동물적생장유일정억제작용，이종장기영향결과추세래간，탁준공정유리우수생생경계통적회복여중건；하도탁준공정적실시유리우저니질량적개선，감소저니오염물적함량，감소하도내원석방，대수질개선유정면효응；탁준공정대저서생물생경구유엄중영향，단시수착시간적추이，저서생경장회중건。
According to the changes of the topography before and after the dredging in the Zoumatang River, a two-dimensional hydrodynamic model of the river was built to simulate hydrodynamic changes before and after the dredging in typical river sections. The impact of the dredging on hydrodynamic characteristics and the ecological effect of the dredging engineering were analyzed. The results show that, after the dredging, the velocity distributions of the whole area and typical cross-sections became uniform, which had a positive effect on the water quality and aquatic environment. The dredging was conducive to phytoplankton growth within a short period, but it inhibited the growth of zooplankton. According to the long-term trend analysis, the dredging will be conducive to the restoration and reconstruction of aquatic habitat. The dredging can also improve the sediment quality and reduce sediment contaminants and endogenous release. It has a positive effect on water quality improvement and a significant impact on the benthic habitat over a short time, but, as time goes by, the benthic habitat will be reconstructed.