river density 中文意思是什麼

river density 解釋
河道密度
  • river : n 1 河,江。 Rriver Thames 或 the R Thames 泰晤士河; the Hudson R 〈美國〉哈得孫河。 the Rriver ...
  • density : n. 1. 稠密;濃厚。2. 【物理學】濃度;密度;比重。3. 愚鈍,昏庸。
  1. The experimental results showed that in the condition of this experiment four algaecides all had strong removing rate on algae, and their removing rate increased with dose increasing, and decreased with algae density increasing. according to the removing rate on algae and cost value or so, the sequence of four algaecides from good to bad were potassium permanganate, copper sulfate, hydrogen peroxide and sodium hypochlorite. in the condition of this experiment, the suitable dose of potassium permanganate was 0. 8mg / l, the algal removing rate was beyond 90 % and the cost of this algaecide was only 0. 0068 / m3. the efficiency of algae removal by four algaecides for huanghe river water was studied. the results showed that the majority of huanghe river water was bacillaroiphyta, and the dominant genera was melosira, which reached 78 % ~ 94 %

    結果表明,在實驗條件下,四種殺藻劑均具有一定的殺藻效果,藻類去除率均隨藥劑投量的增加而提高;原水藻類數量影響殺藻劑殺藻效果,四種殺藻劑的藻類去除率均隨原水藻類數量的增加而降低;通過殺藻效果、經濟性以及安全性等方面的綜合比較,對于以有毒藍藻為優勢藻屬的引灤水,四種殺藻劑的優劣程度從優到劣排序為:高錳酸鉀硫酸銅過氧化氫次氯酸鈉;在實驗條件下,高錳酸鉀適宜投加量為0 . 8mg l ,藻類去除率高於90 ,所需的藥劑費用僅為0 . 0068元m ~ 3 。
  2. So as the enter point of the stream, the income of the reservoir, the time of the flood peak lasted, the quantity of sandiness income and the strobe of the darn. we must do some work to forecast and watch the different density stream. by experiments, we made out that it is impo rtant for us to reduce the water lever in work of the river belongs lots of sandiness

    從異重流試驗看,在正常運用下,水庫產生泥沙異重流的機率較大,能否運動到壩前排出庫外,還要看異重流潛入點位置、入庫流量、洪峰歷時、入庫含沙量、水庫閘門運用等因素,需要做好異重流預報監測工作。
  3. It was found that the rate of algae removal by any one of three algaecides for luan - he river water was higher than that for huanghe river water, in the condition of the same medicamental dose and algae density

    結果表明,在兩種水源水藻類數量相差不大,殺藻劑投量相同的情況下,三種殺藻劑對引灤水的藻類去除率均高於引黃水。
  4. For river networks, its growth subjects are notably influenced by climate, geotectonic movement, and mankind actions. and its character certainly reflects the different conditions of geotectonic movement. statistical analysis of some characters of the river networks including the river direction s, the geometric fractal of main river s and the river network density s in jiaodong peninsula showed that the river networks respond obviously to the neotectonic movement. the area is mainly divided into the west part and the east part by taocun - dongdoushan fault during neotectonic movement

    水系的發育受氣候構造運動和人類活動的顯著影響,構造運動狀況的差異必然反映在水系特徵上。通過對膠東半島水系的展布方向水系分形諸水系特徵的統計分析,揭示出水系受新構造運動有較明顯的響應,桃村東陡山斷裂是本地區東西部新構造上的主要分界。
  5. The factors include antecedent precipitation of low flow period and status of karst basins ( such as lithology, landform, drainage area, drainage density, length and ratio of demotion of main river and so on. ). based on the former studies, integrated the conventional statistic methods, the technique of anns is applied in this paper for researching the law of the low flow of karst basins in guizhou altiplano

    影響喀斯特流域枯水徑流的因素異常復雜,其影響因素主要有枯季前期降水量和巖性、地貌、流域面積、河網密度、主河道長度及其比降等流域下墊面狀況。本文在前人研究的基礎上,採用人工神經網路技術,結合傳統的統計方法,研究貴州高原上喀斯特流域的枯水徑流規律。
  6. The statistics show that the correlation of antecedent precipitation, lithology, landform, drainage density, drainage area, length and ratio of demotion of main river and four characteristics of low flow is very complex

    統計結果表明:流域的枯季前期降水、巖性、地貌、流域面積、河網密度、主河道長度及其比降等因子與喀斯特流域的枯水四特徵的相關關系異常復雜。
  7. The particles aggregation was simulated using particle - cluster and cluster - cluster aggregation model. several type of floes was reached and its morphological characteristics was analyzed the fractal dimension, density and porosity of floes was studied by changing sticking probabilities, sticking position, particle number, particle concentration, difrusion coefficient and motion trajectory. the parameters by which special floes growth were determined. in the study of morphology, floes of yellow river ' s loess particles was observed by tv - microscope. its morphological characteristics were obtained by image analysis. the effect of fractal dimensions by stirring time strring speed, macromolecule flocculant dosage, flocculant concentration and particle concentration was studie. its rule of change was obtained. on the basis of other studies, the flocculation kinetics and floes structure was studied

    本文應用計算機模擬技術,在二維空間內採用單體凝聚和集團? ?集團凝聚兩種模型對顆粒凝聚過程進行了模擬,得到了多種形態的絮體,並對絮體進行了形態分析,通過改變粘附概率、粘附位置、顆粒數量、顆粒濃度、擴散系數和運動路徑等模擬參數,我們考察了絮體分形維數、密度和孔隙率隨模擬條件變化的影響規律,得到了形成特定形態絮體的控制參數。
  8. The system considers synthetically the influence of estuarine ecosystem on the whole basin and human life from aspects of influence on pacts of the environment, biology and human of ecosystem respectively, and adopts the indices of catchment area, population density, inflow amount, period of river flow cut - off, water quality, biodiversity index number and biomass to evaluate the state of estuarine ecosystem

    指標體系綜合考慮河口生態系統對全流域及入類生活的影響,分別從生態系統的環境部分、生物部分以及對人類的影響等3方面,採用集水面積、人口密度、入海量、河口斷流時間、水質、生物多樣性指數和生物量等7項指標對河口生態系統狀況進行評價。
  9. The group plans to build a low - density project adjacent to the beas river, consisting of about 340 houses surrounded by lots of greenery and a tranquil environment

    集團計劃將該塊毗鄰雙魚河的土地發展約340間低密度洋房,四周環境清幽及翠綠林蔭。
  10. The discharging sediment with density current is an only measure to reduce reservoir region " s deposition in the reservoir with storage operation on the overloaded river and an important mode to discharge sediment for deposition reduction as well

    異重流排沙是多沙河流上的水庫蓄水運用時唯一能夠減少庫區淤積的措施,也是水庫排沙減淤的一種重要方式。
  11. The mangrove bushes of 0. 26 acres located along the coast of keya river, adjacent to the exit of the west coastal expressway is an aggregation of many organisms in high density

    位於虎山裡西濱快速道路下,客雅溪沿岸旁,有一片面積0 . 26公頃的水筆仔純林,是許多生物聚集點,生物的密度非常高。
  12. The plan of wangjiadun district will give prominence to the development theme of ecology and humanity, and combine with the low spatial density construction of the city to arrange centralized landscaped water area at south of wangjiadun district, and connect it with yangtze river and hanjiang river to form a large open public place with ecological function ; the dregs of future construction will be piled up to form massifs at north wangjiadun district to create a classic “ south of hill and north of water ” urban image of business district

    王家墩地區的規劃突出生態和人文的發展主題,結合城市低密度空間建設,在王家墩地區南部布置集中綠化水面,與長江、漢江相連接,形成具有生態效用的大型公共開敞空間;利用現狀建築渣土在王家墩北部堆築山丘,營造商務區「山南水北」的經典城市意向。
  13. After a comprehensive review on the study of sediment density current in the recent several decades, a set of differential equations for 2 - d density current under double - layer computational mode is established. by simplifying th. set of equations, a 2 - d numerical simulation of sediment density current and sediment outflow has been made in the liujiaxia reservoir in the yellow river basin, and the result is reasonable

    本論文在對異重流運動近幾十年來的研究成果進行較系統、全面論述的基礎上,針對目前研究較為前沿的異重流運動數值模擬問題,提出了一套二維異重流雙層計算模式下的基本方程,並在這套方程簡化的基礎上,對黃河流域劉家峽水庫中的異重流運動和排沙進行了二維數值模擬,結果令人較為滿意。
  14. To study common law of producing, transporting and discharging sediment of density flow in xiaolangdi reservoir is convenient to using density current better for serving the production and providing scientific basis for regulating water - sediment in xiaolangdi reservoir. simultaneously it has an important reference value for storage operation of reservoir on the overloaded river and provides valuable data for theory development of density current

    研究小浪底水庫異重流的產生、輸移和排沙等方面的一般規律,便於更好的利用異重流為生產服務,為小浪底水庫調水調沙運用提供科學依據,同時對多沙河流水庫的蓄水運用具有重要的參考價值,為異重流理論發展提供寶貴的資料。
  15. The iterative method was utilized for observing the impacts on density of raingauges in a river basin

    藉由無因次半變異圖與區塊克利金法快速推估逐時平均雨量。
  16. Third, based on the parameterization of the related land surface characteristics, using the probability density functions ( pdf ) and the grossly dynamic resistance method, a statistical - dynamical parameterization scheme is put forward. the mean evapotranspiration flux of lower reaches of the yangtze river is calculated by tins scheme and the results are compared with the formers " conclusions. finally, the calculated results by the statistical - dynamical parameterization scheme are compared with the mosaic method

    第三,在進行了有關地表特徵物理量的參數化后,結合擬合的概率密度函數,根據總體動力掌阻抗法,提出了一種考慮網格區整體非均勻性的統計-動力參數化方案,並採用這種方案計算了長江三角洲地區的平均蒸發散通量,計算結果與以前研究者的研究成果進行了比較驗證。
  17. The confluence between viscous debris flow and river flow considered as density flow is based on the assumption that the main influence of converging into water flow is the transform of riverbed

    在探討入匯機理的基礎上,認為粘性泥石流入匯對主河的影響主要體現在河床地形的改變。
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