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- river channel sand excavation 河道采砂
- sand excavation in river channels 河道采砂
- Preliminary analysis of competition way in river channel sand mining license 浅析以竞争方式实施河道采砂许可
- Factors and standards in bid evaluation of sand excavation right in Yangtze River channels 长江河道采砂权招标投标中评标因素和标准
- On "Yangtze River Management mode" and river channel sand mining management in China "长江模式"与全国河道采砂管理之浅议
- The channel sand is not of the cut-and-fill type. 水道砂岩不是切割--充填类型的。
- The calculation results show that the influence of sand excavation on riverbed evolution, navigation, flood carrying capacity and wading engineering of the haling River is very small. 结果表明,采砂对河床演变、通航、河道行洪以及涉河工程的影响很小。
- Mining sand and gravel or placer gold in river channel or navigation channel without approval or not in accordance with the approved scope and operation procedures. 未经批准或者不按照批准的范围和作业方式,在河道、航道内开采砂石、砂金的。
- Next autumn, we will dig and dredge this river channel. 明年秋天我们就要开浚这个河道了。
- The calculation results show that the influence of sand excavation on riverbed evolution,navigation,flood carrying capacity and wading engineering. 结果表明,采砂对河床演变、通航、河道行洪以及涉河工程的影响很小。
- The retaining dike is constructed by bulldozing in warping area, then taking sand directly from the river channel using silt-sucking boat and DPB bump platform. 围堤采用推土机从淤区内推土填筑,简易吸泥船和DPB电泵平台直接从河道内取沙。
- Self-formed river channels tend to be sinuous. 自动形成的河槽是趋向于弯曲的。
- On the other hand, in order to protect water environment, maintain flood prevention safty ond navigation, we should take actions to sand excavation control. 根据维持河床冲淤平衡、河道整治和经济建设的要求,需要合理利用砂石资源。
- Believed to be river channels or canals. 相信这些可能是河道或运河。
- sand excavation in river courses 河道采砂
- Sublacustrine fan, braided channel sand body easy to the formation of lithologic reservoirs. 湖底扇、辫状沟道砂体易于形成岩性油气藏。
- Through classified evaluation on reservoir rocks, this paper indicates that the key exploration area is deltic channel sand body. 对储集岩进行分类评价,指导勘探的重点区域为三角洲河道砂体。
- Through dynamic river bed experiments and fine sand river bed in lower Yellow River,localized scouring on piers under unsteady flow when river channel is narrowed in large scale is researched. 通过动床试验,结合黄河下游细沙河床研究了大尺度缩窄河道时非恒定流桥墩的局部冲刷。
- The reservoirs in the study area are mainly delta plain distributary channel sand body and delta front underwater distributary channel sand body. 研究区储层主要为三角洲平原分流河道及三角洲前缘水下分流河道砂体;
- In the tight Upper Triassic sandstone with low porosity and permeability, the distributary channel sand body would be the beneficial target. 在致密低孔低渗的上三叠统厚层砂岩中,分流河道砂体储集性能最好,是勘探的有利目标层。