水利与建筑工程学报
水利與建築工程學報
수리여건축공정학보
TECHNIQUE OF SEEPAGE CONTROL
2013年
5期
45-51
,共7页
非淹没植物%明渠水流%非均匀流%糙率系数%水力特性
非淹沒植物%明渠水流%非均勻流%糙率繫數%水力特性
비엄몰식물%명거수류%비균균류%조솔계수%수력특성
unsubmerged vegetation%open channel flow%non-uniform flow%roughness coefficient%hydraulic prop-erties
根据水力学对明渠水流流动类型的划分，提出按均匀流和非均匀流分别进行研究的新思路。通过对植物段上游水流和植物段水流的研究，得到种植植物后植物段上游形成 M1型非均匀流，植物段基本形成 M2型非均匀流，其相对水深随排列密度增大而增大，种植物前非均匀流水深越小，种植物后水深变化越大，植物段的相对糙率系数和相对水力坡度均随植物排列密度增加而增大，且植物横向加密比纵向加密糙率系数增加的快，阻水效果更明显等结论。
根據水力學對明渠水流流動類型的劃分，提齣按均勻流和非均勻流分彆進行研究的新思路。通過對植物段上遊水流和植物段水流的研究，得到種植植物後植物段上遊形成 M1型非均勻流，植物段基本形成 M2型非均勻流，其相對水深隨排列密度增大而增大，種植物前非均勻流水深越小，種植物後水深變化越大，植物段的相對糙率繫數和相對水力坡度均隨植物排列密度增加而增大，且植物橫嚮加密比縱嚮加密糙率繫數增加的快，阻水效果更明顯等結論。
근거수역학대명거수류류동류형적화분，제출안균균류화비균균류분별진행연구적신사로。통과대식물단상유수류화식물단수류적연구，득도충식식물후식물단상유형성 M1형비균균류，식물단기본형성 M2형비균균류，기상대수심수배렬밀도증대이증대，충식물전비균균류수심월소，충식물후수심변화월대，식물단적상대조솔계수화상대수력파도균수식물배렬밀도증가이증대，차식물횡향가밀비종향가밀조솔계수증가적쾌，조수효과경명현등결론。
Based on the classification of the types for open channel flows,the studies for the uniform flow and non-uni-form flow were performed in the experiments.The flows of upstream reach and vegetation reach were studied respectively. The results show that M1 non-uniform flow is formed in the upstream reach,and M2 non-uniform flow is formed in the vegetation reach basically after planting the rigid cylinders in the flume.The relative depth is increase with the increasing of cylinder density,and the lower the depth of the non-uniform flow before planting cylinders,the larger is the change of the flow depth after planting cylinders.Simultaneously,both the relative roughness coefficients and relative energy slopes are increased with the increasing of the cylinder density in vegetation reach,and the increasing of the cylinder density in transverse direction produces the higher roughness coefficients than that in longitudinal direction,thus the water-tight ef-fect is more obvious.
