In order to understand the impact of vegetation groups on the hydraulic characteristics of natural meandering river, this paper designed two kinds of layout forms in which the cluster layout simulated the natural cluster vegetation group, and the uniform layout simulated the artificial regular planting vegetation group. Through the flume experiment, the impact of different layout forms of vegetation on the distribution of flow field, hydrodynamic axis, turbulent kinetic energy and transverse circulation structure in continuous bends was explored. The results show that the flow field in the bend appears obvious velocity partition in which the high velocity area is close to the convex bank, and the low velocity area is attached to the concave bank. Vegetation layout makes the distribution range of high and low flow rate areas have the opposite change rule: the high flow rate area increases, while the low flow rate area decreases. Under the action of the bend, the hydrodynamic axis 'gradually swings to the convex bank on the upstream side of the bend top, close to the convex bank near the bend top and swings to the concave bank on the downstream side of the bend top, completing a cycle of motion changes. Vegetation layout makes it swing to the middle of the flume and the deviation degree of cluster layout is greater than that of uniform layout. Under the action of the bend, the distribution of turbulent kinetic energy of water flow is small on both sides and large in the middle. On the whole, the layout of vegetation increases the turbulent kinetic energy on the downstream side of the bent top, and the impact of cluster layout is greater than the uniform. The vegetation layout changes the circulation structure of the section, which is manifested by the swing of the vortex core position and the change of the distribution range.

In order to make up for the shortcomings of the single Gini coefficient method in the evaluation of spatial equilibrium of water resources, it needs to systematically evaluate the matching relationship between water resources and social development. Selecting arable land area, population size, industrial and agricultural output value and gross product in Xinjiang as the indicators, which affects the carrying capacity of water resources, combination of correlation number method and Lorenz curves was used to quantitatively analyze the equilibrium between regional and sub-regional water resources and indicators. Five element subtractive set of potentials was adopted to identify the development of equilibrium of sub-regional water resources. The results show that the overall water balance in Xinjiang has been rising and then falling during 2011-2018, and is uneven from year to year. The analysis of the indicators shows that the water balance fluctuates between uneven and uneven. The analysis of the sub-regional water balance and trends shows that most areas are in an uneven and inverse state, and exacerbates the unevenness of water resources and identifies the targets for water balance regulation, which points out the direction for reasonable improvement of the balance of water resources.

At present, most leakage location methods rely on the hydraulic model of the pipe network. However, when the accuracy of the hydraulic model cannot meet certain requirements, or when the model cannot be established due to the lack of basic data, the model-based method will fail. For this purpose, the study of the leakage location of the water supply network was carried out on the basis of pressure monitoring data. Based on the modeling theory of graph theory, the interpolation method for estimating the node pressure of pipe network was obtained. The leakage position was estimated by analyzing the residual of the pressure monitoring value of each node and the measured value after the leakage occurs. With the help of Bayesian theorem, time-series reasoning was carried out on the positioning results, and the node with the largest probability in a certain period of time was regarded as the location where leakage occurs. By using the case of L Town, the state of pipe network was simulated when single point leakage occured, and the feasibility and location performance of the leakage location method were verified.

Landslides induced by typhoon rainstorm has the characteristics of abruptness and difficulty in the investigation. Taking the Shanzao landslide that occurred during the typhoon "Lekima" as an example, based on 24 landscape data of Railway Sentinel-1 from Sept. 12, 2017, to Aug. 9, 2019, this paper analyzed the sequential cumulative deformation of landslides in this period by SBAS-InSAR technology and further analyzed the regularity of surface deformation of landslide mass with meteorological data. The results show that the deformation before the occurrence of Shanzao landslide is mainly divided into three stages: creep stage of landslide mass, deformation of front edge of landslide mass increases significantly and gradually expands toward the middle of the slope mass, and accelerated deformation stage of the rear edge of landslide mass. The vertical deformation rate and accumulated deformation data of InSAR monitoring points on the landslide mass show that the deformation rate and accumulated deformation in the front and middle of slope are small, and it mainly focus on the rear edge of the landslide, with the maximum deformation rate and accumulated settlement of 40 mm/a and 320 mm respectively. The landslide is a push-over landslide. The research results provide a new idea and method for the early identification, monitoring and early warning of landslides, and have a certain reference value for the prevention and control of landslide disasters.

In order to effectively grasp the reactivation mechanism and deformation law of the old landslide, this paper takes the bedding old landslide in a metamorphic rock area as the engineering background and combines the deformation monitoring results to carry out the existing deformation law analysis and deformation prediction research. The result of the case analysis shows that the deformation characteristics of the resurrection body of the old landslide are significant, especially the deformation in the middle of the resurrection body. Through the deformation prediction, it is concluded that the cumulative deformation of the resurrection body will still increase, and its stability will tend to weaken. Among them, the deformation in the middle position has no trend of convergence, that is, the increase rate will also tend to increase, and its stability will weaken more, so it is very important to carry out its prevention and control.

To improve the state detection effect of large supercritical generator rotor set, the RSO (Cyclic Periodic Electrical Impulse) detection method of large supercritical generator rotor set based on time difference calculation is designed. According to the principle of RSO detection method, the characteristics of time difference pulse signal are extracted. The detection model of coil short circuit is constructed according to the time difference characteristics of signal. Wavelet transform is used to denoise the time difference signal. Fix the rotor position and winding parameters are fixed to determine the fault position of the rotor set. Thus, the RSO detection of the rotor set of large supercritical generator unit is realized. The experimental results show that the difference between the detection results of the power spectrum amplitude of the initial rotor position, the rotor position at startup, the normal broken bar and the broken bar fault is small, which verifies the effectiveness of the proposed method.

The measured deformation data contain rich temporal and spatial information and evolution laws of dam deformation. To study the co-integration relationship of the aging deformation of extra-high arch dams, wavelet decomposition was firstly used to obtain the aging component of the dam displacement. Considering the weak spatial integrity of extra-high arch dams, the FCM clustering algorithm was utilized to realize the regionalization of aging deformation. With the help of the idea of regional linearization, the spatial nonlinear co-integration relationship of the whole dam aging deformation was transformed into several approximate linear co-integration relationships within different regions. The zonal co-integration model was established to describe the development law of time-varying co-integration in different regions of the dam. The co-integration development monitoring and early warning of multi-measuring points aging deformation were realized by co-integration residual.

Aiming at the problem of campus waterlogging in Hefei City, this paper constructs a 1D-2D coupled model based on Mike Flood. Firstly, GIS was used to obtain the distribution information of the five types of land surface in the study area by analyzing satellite images, and to automatically divide the catchment areas. Secondly, combined with the measured elevations by using the RTK device, the 3 m×3 m high-precision DEM data of the study area were obtained. A 1D pipeline model and a 2D surface model in the study area were constructed using Mike Urban and Mike 21 respectively, and the two models were coupled on Mike Flood. At the same time, a flowmeter, a liquid level meter and a rain gauge were installed in the campus. The model was calibrated by two measured rainfall events according to R² and E_NSE. Finally, the Chicago rainfall pattern was used to design rainfall scenarios for the 5, 10, 30 and 50 years of recurrence periods, and the severity, inundation range and inundation depth of nodes and pipelines in different rainfall processes were simulated. The simulation results show that main causes for the waterlogging in the campus are due to unreasonable sub-catchment designs, which resulted in limited absorption of rain peak runoff and serious overload of the pipe network.

Flow and sediment are the driving force and material basis for shaping the riverbed. The process of flow and sediment changed by the operation of Three Gorges Reservoir leads to severe riverbed adjustment downstream of the dam. This paper selects the straight-braided channel-Bailuoji as typical which locates in the middle reaches of the Yangtze River, and analyzes the channel development characteristics from perspectives of channel storage capacity, beach-trough scouring and silting and branch channel diversion capacity variation after the impoundment of the Three Gorges Reservoir. Combined with the change in the duration of floods above the channel forming discharge, the impact of the flow process change on the development of the Bailuoji Reach is quantitatively calculated. The results show that in recent years, the channel storage capacity of the Bailuoji reach has increased and scouring mainly locates in the low-flow channel. The right branch is the main branch and the diversion ratio has increased under the low-discharge. The flow and sediment conditions after the impoundment of the Three Gorges Reservoir can maintain the development of the main branch of the Bailuoji reach. Compared with the flow process without reservoir regulation and storage, the duration of high flow above the channel forming discharge is relatively shortened under the current dispatching mode, the total amount of erosion in the Bailuoji reach is relatively small and the diversion ratio of the right branch is slightly reduced. The research results can provide reference for middle-small flood dispatch of Three Gorges Reservoir.

When the source-based reduction facilities cannot be carried out during the construction of sponge city, the stormwater control measures (SCM) are usually set up at the terminal drainage outlets to achieve the goal of runoff control and pollutant reduction. Because there is usually large drop between the drainage outlet and the waterfront zone in mountain city, resulting in a high flow rate of water from the drainage outlets, it is easy to cause strong hydraulic erosion to the SCM and may adversely affect their normal operation. Based on the falling-sill dissipation facility installed according to the high drop topographic features of drainage outlets in Chongqing urban, the numerical model with FULENT software was constructed to simulate the hydraulic process of different energy dissipation configurations in this study. The results show that the solid-baffle typed falling-sill dissipation facility has out-performance energy dissipation, and the energy dissipation rate was as high as 90%, and the outlet velocity of the end of facilities was irrelevant to the inlet flow, while only related to single drop height. The higher the single drop height, the water flow was susceptible to form a hydraulic vortex in the backwater area of falling-sill under the influence of potential energy, which can lead the greatest extent of turbulence kinetic energy dissipation, and finally result in a gradual decrease of the maximum pressure of water flow in the horizontal direction to achieve the targeted hydraulic energy dissipation.