Advanced Materials Research Vols. 864-867

Abstract: In this paper, the effect of wave dissipation on curtain wall structures is analyzed. We use physical model experiment and simulation of SPH method to study the interaction process of waves with the building, and examine the wave dissipation effect of curtain wall structure under different draft or different wave-breaking chamber’s length. Meanwhile, movement of water body in the chamber is researched. Studies show that: when the experimental depth is 0.4m, the effect of wave dissipation on curtain wall structures is most obvious when width of wave-breaking chamber is 0.12 times the wave length and the relative draft depth of curtain wall is 0.5m.

Abstract: AHP, a simple and practical method for multi-criteria decision-making, is widely used in many decision-making processes of engineering projects. Owing to a large number of coal mining in Feng Zi Jian mining Area in Da Tong, it leads to many water environmental quality problems. According to the principle of AHP, it establishes hierarchical models, creates judgment matrix, counts its weight and maximum eigenvalue from the local to the whole, tests its consistent, analyzes the factors quantitatively which impact Feng Zi Jian mining Area water environmental quality, finally, and makes status evaluation for the quality of water environment of the mine. The results show that, AHP is intuitive, effective and has an objective reality during the process of calculating the weights of each factor. It achieves the results of the evaluation with satisfactory.

Abstract: As a largest wetland of north China, Lake Baiyangdian is of great significance to the regional climate and ecological environment. However, as the impact of human activities and dry climate, the lakes water pollution and eutrophication is becoming worsen and worsen. We analyzed the hydro-chemical composition and used five indexes [Chla, TN, TP, COD_Mn and S to assessment the hydrochemistry characteristics and eutrophication level of Lake Baiyangdian. The results show that the type of water was CII^Na. Using principal component analysis, we find that TN and TP are the two main factor of the lakes pollution. The diatom assemblage shows that the main diatom species are Cymbella microcephala and Synedra nana and the contents of Cyclotella atomus and C.meneghiniana have reached a relative level which is indicating Lake Baiyangdian has been in a state of eutrophication.

Abstract: The dam displacement is related to multiple factors such as time, temperature, water level and etc. And it presents a strong nonlinear and certain randomness.Neural network model because of its inherent characteristics can better simulate the dam displacement.Nowadays,It has methods to estimate the displacement of the dam by constructing physical model and BP neural network model.But BP neural network's training time is too long and the forecast effect is not very good.So this paper introduces Elm neural network model,establishs Elm neural network model of dam displacement early warning considering multiple factors to estimate the displacement.By a simple example and compared with BP neural network model to reflect the rationality and scientificity of this method.

Abstract: Maximum distribution of hydrodynamic pressure on the flume sidewall were studied in this paper based on the finite element method. It contains the difference comparison of theoretical and numerical formulas, rules of maximum hydrodynamic pressure distribution under regular and irregular incentives, and hydrodynamic pressure changes with different height of bracket below the aqueduct. Studies show that: In the 30m height range, with the rise of bracket, the hydrodynamic pressure grows linearly.

Abstract: Since the economic development and environment deteriorating, water security has become an increasingly serious problem in the world. A number of regions are suffering water scarcity and pollution. The Water Poverty Index (WPI) could provide a standardized evaluation framework for the utilization and development of water resources in a certain region. This article based on the calculation of WPI, analyzed the components of WPI at basin scale, and calculated the WPI at Shule river basin, Shiyang river basin and Heihe River Basin, thereby, identified the water security and find out the main problems of water resource management and utilization in the three inland river basins in Gansu corridor.

Abstract: Monitoring of coastal saline soil water and salt transport is of great value on the soil physics and irrigation studies. In this paper, a vertical infiltration experiment was conducted to monitor the vertical variation of resistivity in the leaching process under different water level in an experimental tank by the designed automatic monitoring device. The experimental results showed regardless of whether the groundwater exist, the resistivity peak moved down in the curve of leaching, and the desalination occurred from the top to bottom, the desalination depth remains the same with the same leaching amount. However, the groundwater reduced the speed of water and salt transport and affected the water and salt migration of upper soil due to the capillary force.

Abstract: Flood design has been one of the most important links during the previous work of hydraulic engineering construction, and is an significant reference for engineering construction standard and scale. Recently, rainstorm calculating method is often used to design flood of hydraulic engineering, and seems to be an mature design one. Aiming at application of rainstorm calculating method on flood design, based on Shengli Reservoir engineering case, an detailed calculation was made some reasonable calculating steps, formula and standard were established. The results showed rainstorm calculating method can provide an accurate outcome, such as areal rainfall, runoff generation, rainfall hourly distribution, etc. Moreover, the maximum confluence comes at the 16th hour and the higher frequency, the higher confluence. These conclusions can provide some certain references for other similar hydraulic engineering.

Abstract: Observations on 6 ship moorings during the spring and neap tides show that the suspended sediment concentration (SSC) changed according to the variation of the local tidal forcings under the normal weather conditions. During the neap tide, the measured concentration of suspended sediment is comparable to that of Jinjiang River, the only external sediment source in the course of observations; while during the spring tide, the observed SSC is one order higher than that of Jinjiang, meaning that relative to the riverine impact, the tidal current is more probably responsible for the sharp variation of SSC between the spring and neap cycle.

Abstract: The generalized Green-Ampt models, based on the Green-Ampt approach, is suitable for simulating infiltration into layered soils during unsteady rainfall, however, there are still some problems with using this approach. The objective of this paper is to improve the generalized Green-Ampt model, and then evaluate the performance of the generalized Green-Ampt model in modeling the infiltration-runoff into multi-layered soil during rain. Firstly, based on the generalized Green-Ampt model, we propose and improvement to the generalized Green-Ampt model to overcome deficiencies in it. Then, one-dimensional infiltration-runoff experiments during rainfall were performed in multi-layered soil columns, and the runoff rate, cumulative infiltration and wetting front distance from soil surface were calculated with the modified generalized Green-Ampt model, and compared with the observed data in the experiments. The results indicate that the modified generalized Green-Ampt model predicts the multi-layered soil infiltration-runoff process well.