| 1. | Calculation of water surface profile for earth dam with core wall during level fall of reservoir
水库水位降落期心墙土坝水面线计算 |
| 2. | The flume experiment with single spur dike is carried out . water surface profile and velocity field of flow in flume are measured by manometer tube and propeller current meter respectively
首先进行了单丁坝水槽实验，采用测压管和旋浆流速仪对实验水槽中水流的水位以及流速场进行了详细的测量。 |
| 3. | The value of correction coefficient of kinetic energy increases as a result . the water surface profiles of flume experiments are computed by three different methods : adjusting the local head loss coefficient , deduction of backwater area , and application of backwater expression
随后结合实测水位资料，通过采用调整局部水头损失系数、扣除回水面积以及壅水公式等不同的水面曲线计算方法对实验水槽一维水面曲线进行计算。 |
| 4. | Comparison of water level between measured and computation shows that the local head loss coefficient cannot give head loss by spur dike completely , and the effective area of passage is difficult to be ascertain . for this reason the two methods for water surface profile computation cannot predict the raise of water level upstream the spur dike accurately
计算结果表明，局部水头损失系数并不能完全反映出由于丁坝阻挡所带来的水头损失，而丁坝附近的有效过水面积难以准确地确定，这些导致前两种方法均不能很好地计算出丁坝上游水位的壅高值。 |
| 5. | Through flume experiment and numerical simulation , preliminary work on computation of water surface profile in regulation river reach , numerical simulation of flow with single spur dike in flume , and 3 - d numerical solution of flow around spur dikes group are carried out in this paper
本文通过模型实验和数值模拟相结合的研究方法，在整治河段一维水面曲线计算，单丁坝绕流数值模拟，紊流数学模型在航道整治工程中的应用以及丁坝群附近水流的三维流动特性等方面做了一些初步研究。 |
| 6. | So far as the aqueduct with large discharge and lower head is concerned , the non - uniform flow will occur in the aqueduct , when the discharge is enlarged after the water - carrying section being determined based on the design discharge and the given head ; for which the flow condition must be presumed , so as to determine the water surface profile
摘要大流量低水头渡槽根据设计流量和给定水头确定过水断面后，通过加大流量时，渡槽内就会发生非均匀流，需对这种水流情况进行推算，以确定渡槽在通过加大流量时的水面线。 |
