The light - scattering property of sediment suspension was analyzed , and an infrared technology was used to satisfy the measurement requirements 由于懸沙系統(tǒng)性質(zhì)的特殊性,使得問題相當(dāng)復(fù)雜。
Water quality - evaluation of the aerobic biodegradability of organic compounds at low concentrations - shake - flask batch test with surface water or surface water sediment suspensions 水質(zhì).評價低濃度有機化合物有氧生物降解能力.地表水或地表水懸浮質(zhì)泥沙搖瓶試驗
Integrating with dynamic function , the hydrodynamic inducement of sediment suspension and a conceptual model for nutrient release from sediment in large shallow lake were suggested 結(jié)合水動力作用,提出了大型淺水湖泊水動力作用導(dǎo)致底泥懸浮,從而使得底泥中的可溶性營養(yǎng)物質(zhì)釋放這一內(nèi)源釋放的概念性模式。
Based on the field investigation of the wave and sediment suspension in taihu lake , along with sampling water by layer and analyzing the nutrient concentration change with depth , it was found that the nutrient concentration enhanced suddenly on the bottom . layer indicating the influence of sediment 摘要通過在太湖開展的風(fēng)浪與底泥懸浮的野外觀測,結(jié)合分層采取水樣并分析水體中溶解性營養(yǎng)鹽的濃度隨深度的變化結(jié)果,發(fā)現(xiàn)在水土界面的上覆水中營養(yǎng)鹽濃度有突然增加的現(xiàn)象,指示著沉積物對上覆水營養(yǎng)鹽濃度有影響。
By performing fourier transformation , the relationship between the turbulent intensity of the particle and that of the carrier fluid was obtained which makes clear that particle size , specific gravity , velocity gradient , and the characteristic frequency of energy - containing eddies are four basic influencing parameters . it is proven theoretically that under certain conditions , the stream - wise and transverse particle turbulent intensities exceed those of the carrier fluid . based on the equations of two - phase flow , the presence of fine sediment suspension is shown to attenuate the turbulent intensity of the water 通過對細小顆粒在剪切流場中運動方程的fourier分析,得到了顆粒脈動強度和流體脈動強度之間的定量關(guān)系,表明顆粒粒徑、顆粒密度、流速梯度以及紊動場含能旋渦的特征頻率是影響顆粒脈動強度的主要因素,首次從理論上證明了在一定條件下,顆粒在縱、垂向的脈動強度均會超過相應(yīng)的流體脈動強度,為已有的實測資料提供了合理的解釋。