1) sediment deposition in lower reaches of Weihe River
渭河下游淤积
2) lower Weihe River
渭河下游
1.
Auto-regulating function of channel of Lower Weihe River since 1960;
1960年以来渭河下游河道的自动调整作用
2.
Stable lowering of Tongguan bed elevation and comprehensive regulation of the lower Weihe River;
潼关高程的稳定降低与渭河下游河道综合治理
3) lower course of Weihe River
渭河下游
1.
In the history,the super and large floods happen in the lower course of Weihe River for many times,so to bring about the serious disasters in the region.
历史上,渭河下游发生多次超大型洪水,给该地区带来了严重的灾害。
4) the lower Weihe River
渭河下游
1.
Study on sediment-carrying water volume in the lower Weihe River;
渭河下游输沙用水量研究
2.
River Shrinkage and Harnessing Countermeasures of the Lower Weihe River in Recent Period;
渭河下游近期河道萎缩特点及治理对策
3.
A 1-D sediment transport model was applied in this paper to study the processes of scouring and silting in the lower Weihe River and the river course from Tongguan Station to Sanmenxia Reservoir as well as possible falling of the Tongguan elevation due to the effect of the Changjiang River-to-Weihe River Water Transfer Project.
采用一维泥沙数学模型计算与分析了引江济渭工程不同引水方案对渭河下游河道和潼三河段冲淤及降低潼关高程的作用。
5) downstream of Weihe River
渭河下游
1.
Research on the relationship between bank-full discharge and runoff-sediment condition in the downstream of Weihe River;
渭河下游平滩流量与水沙条件响应关系研究
2.
Based on analysis of the inherent relationship between the changes of erosion and deposit in Tongguan reaches and in lower reaches of Weihe river,the author pointed out that the changes of erosion and deposit downstream of Weihe river is in good agreement with the changes of erosion and deposit at Tongguan reaches.
三门峡水库控制运用以来,潼关高程持续抬升,渭河下游仍在淤积发展,究竟是潼关高程抬升引起渭河下游淤积发展,还是渭河下游淤积发展造成潼关高程的缓慢上升,一直是三门峡问题的焦点。
6) lower reaches of the weihe river
渭河下游
1.
In this study,the change of landscape pattern and its driving forces in the flooded area along the lower reaches of the Weihe River during the period from 1989 to 2000 are lucubrated using RS and GIS means.
应用GIS/RS技术与景观格局分析软件FRAGSTATS,研究了1989-2000年渭河下游洪泛区土地景观格局变化及其驱动力。
2.
The frequent flood and unreasonable land use deteriorate the land use risk problem in the flooded area of the lower reaches of the Weihe River, which cumbers the economy development of this area.
渭河下游洪泛区由于频繁的洪涝灾害和不合理的土地利用方式,使得土地风险问题日益突出,直接制约了渭河流域下游洪泛区的经济发展。
补充资料：坝区泥沙淤积
坝区泥沙淤积
sedimentation in dam area
boqLJ rl}sho ytljl坝区泥沙淤积(Sedimentation in dam area)河流上筑坝塑水后，由于塑水区内水深加大，流速降低，泥沙沿程淤积，并向坝前推进，造成坝前泥沙的淤积。坝区泥沙淤积产生的问题主要有:①在船闸引航道中及其口门附近产生淤积，使航深不足或水流不顺而有碍通航。②电站进水口前的泥沙堆积使过机水流中的含沙量增大，泥沙变粗，造成过水建筑物或水轮机过流部件的严重磨损。③坝前泥沙淤积有可能影响问门启闭，堵塞泄水孔，影响大坝安全。 以通航为主的枢纽和以发电为主的枢纽对坝区水流条件的要求不同，防治坝区泥沙淤积的措施也不一样。 (1)以通航为主的枢纽。宜将船闸布置在靠近稳定深乱线一侧，要避开弯道的凸岸和回流、缓流区。这些地区都是泥沙集中淤积处，且淤积后又难于冲走。结合各个工程的实际情况，可设置某些导流排沙工程，如修建引航导墙以破除回流减少淤积;设置底部高程较低的冲沙闸，以定期冲刷上游及下游引航道淤沙。 (2)以发电为主的枢纽。高水头水电站的防沙措施主要是设置高程较低的排沙孔。排沙孔布置在机组进水口的下面，防沙效果最好，但结构复杂，施工及管理都不便。一般把排沙孔设在进水口的侧下方，其位置以使进水口处在冲刷漏斗的影响范围之内为原则。低水头枢纽的防沙措施，主要是进行合理的平面布置。如利用弯道环流特性，正面取水，侧面排沙，同时设置导沙坎，常能取得较好的防沙效果。在中小型水库中，也可采取清浑水分治的办法，即在童水区上游修建排浑渠(或排浑洞)，当汛期洪水人库时，可将浑水通过排浑渠(洞)直接排往坝下游，减少主库淤积，缓解坝区泥沙问题。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条