To study the suitability of applying slow-release fertilizer of rice cultivation coupled with water saving irrigation, barrels of rice cultivation experiment under different fertilization and irrigation treatments were carried out during rice growing period in 2014. Results show that final promoting effect for rice chlorophyll SPAD value, tiller number applying slow-release fertilizer are obviously better than that applying conventional fertilizer, and is not weaker than that for height. The highest yield is 15542 kg/ha gained by continuous flooding irrigation and slow-release fertilizer treatment, second is 11408 kg/ha by alternate wetting and drying and conventional fertilizer, the lowest is only 6074 kg/ha by alternate wetting and drying and slow-release fertilizer treatment. Total dry matter accumulation applying slow-release fertilizer is 164.7% higher than that applying conventional fertilizer on average. So we conclude that traditional AWD mode of rice cultivation may not apply to slow-release fertilizer.

In order to realize the efficient use of water resources in arid areas of northwest China by extending the application of regulated deficit irrigation technology in maize, the mild and severe regulated deficit treatments at seedling stage and jointing stage of maize with plastic film mulching under furrow irrigation were arranged to study the effects of different regulated deficit treatments on the growth and development, water consuming characteristics, yield traits and water use efficiency (WUE) . The results showed that regulated deficit treatments at the seedling and jointing stage could decrease plant height, leaf area index, ear length, ear diameter, row numbers per ear, kernels per row, grain weight per ear, 100-grain weight and yields, as well as lead to a significant reduction in water consumption, and the impact severity of regulated deficit on them enhanced with an increase in water deficit intensity. Mild regulated deficit treatments did not significantly affect grain yields (p>0.0.5), and could significantly improve WUE (p <0.05), while the severe regulated deficit at jointing stage made a maximum reduction in grain yields by 26.41% and significantly lowered the WUE. The suitable way to control water for maize production in this area was the mild regulated deficit irrigation at seedling stage or mild regulated deficit irrigation at jointing stage, which reduced the water consumption by 7.96% -11.02% and improved the WUE by 2.68% -4.41% without a significant decline in grain yields.

The determination of water deficit sensitive index is the basis of precision irrigation crops, In the rain shed with mulched drip irrigation, this paper through the plot experimental observations on the Biggest fluorescent Fm, PSⅡpotential activity Fv/F0, PSⅡphotochemical efficiency Fv/Fm, explore corn chlorophyll fluorescence index to the sensitivity of soil water deficit. The results show that (1)during the maize tasseling, When soil moisture is 85% of field capacity, three ChlorophyⅡFluorescence indicators of mazie reached the highest, and the canonical correlation coefficient between maize ChlorophyⅡ Fluorescence parameters and soil moisture is 0.832. which is very significant. PSⅡphotochemical efficiency Fv/Fm is the most sensitive to soil moisture. (2) During the maize filling, when soil moisture is 80% of field capacity, three ChlorophyⅡFluorescence indicator of mazie have reached the highest, and each ChlorophyⅡ Fluorescence Parameters were higher than those during the tasseling stage. The canonical correlation coefficient is 0.893, which is very significant. And PSⅡpotential activity Fv/F0 is the most sensitive to soil moisture. As mentioned above, Chlorophyll fluorescence parameters are sensitive to soil moisture changes, may well response corn water deficit condition, can be used as a guide the corn in the field of precision irrigation index.

The evapotranspiration is the important evidence of the hydraulic engineering design,water resources planning and farmland irrigation water management .based on the the long series test data of irrigation in jiangxi and combined with the analysis and calculation methods,the spatiotemporal distribution and reasons of evapotranspiration of rice in jiangxi was analyzed in hydrological years of 50% through the charting method of isoline map by using the grid method has nothing to do.The results indicated that the evapotranspiration of whole growth period in the frequency years of 50% had great difference,the late rice was higher than early rice by 33.80%;the evapotranspiration of early rice in high altitude mountainous area was lower,but it was higher in Middle and Southern Jiangxi;the evapotranspiration of late rice in high altitude mountainous area was lower too,but the distribution of high value area was more dispersed,including same areas in middle and southern Jiangxi.; the evapotranspiration of rice was negative correlation with high altitude and annual rainfall,and it was positive correlation with the reference crop evapotranspiration in the growing period.

The implement of the Middle-route South-to-North Water Diversion Project is helpful to solve the water shortage in North China, but also will have an influence on the relationship between supply-demand of water resources and the hydrological regimes of the lower reaches of Hanjiang River. Based on calculating the minimum eco-environmental water requirements from the river channel therein in Montana、7Q10 and the monthly guaranteed frequency method, and calculating the abandoned floodwater of flood season in abandoned floodwater coefficient, the deduction method is used to calculate and analyze the water resources availability under present situation and different schemes of the water transfer project. The conclusions are that the water resources availability reduces by the increasing of water transfer; the water supply ensuring ratio of extremely low runoff years and below-average runoff years under the scheme of the water diversion of 145×108m3 is relatively low, while its water resources availability can increase by the water transfer project from Yangtze River to Hanjiang River, thereby meeting the water demand of the lower reaches of Hanjiang River; the availability factor of water resources under the scheme of the water diversion of 82×108m3 is at the highest level, and the present situation is the lowest.

In order to alleviate the water crisis of Rushan city and improve the reservoir’s ability of using the rainfall flood resources, it researched the dynamic flood limit water level control in flood period of Longjiaoshan reservoir. It calculate the dynamic flood limit water level by using Fish optimized segmentation method, peak value of comprehensive control method, and so on. According to the security of reservoir and downstream, the control levels of early flood period, flood mid and late flood season are determined to 41.43m, 41.32m and 41.41m respectively. Selection of 2007 and 2009 flood season as an example that used the water level to count under the current flood risk condition. Compared to the present situation, the results show that this method can raise the utilization of the rainfall flood resources by .reservoir in flood season. With the construction of hydrological forecasting and flood control system, the Longjiaoshan reservoir use dynamic flood limit water level. It can as much as possible storage make full use of rainwater resources, thus, alleviate the contradiction between supply and demand of water resources in Rushan city.

By establishing water-level forecasting models based on multiple regression method, Multivariate hybrid regression method, the paper studies the Changfatun station on the middle reaches of the Heilongjiang mainstream, and analyzes and compares the outcomes of these models. It shows that the model based on Multivariate hybrid regression method has higher accuracy in water-level forecasting. Besides, Multivariate hybrid threshold regression model is best and steadies on prediction capacity and has excellent performance in forecasting water-level of flood peak. Three kind of Multivariate hybrid regression method are accurate within acceptable range, and can be used for water-level forecasting.

To state the development trend of river system under external stress totally,I construct early warning indicators model of river health to analyze river health of police intelligence and forecast warning degree,with biological immune theory and the trend extrapolation forecasting method.I analyze the health condition of Huai Si River, and forecast its warning degree in a few year.The studies show that based on the immune theory of river health early warning system can simulate early warning of rivers health status.After forecasting and analyzing the health condition of Huai Si River,it should be dong that strengthening the daily management of the river and on a regular basis for river dredging remediation.

To study the different factors affecting hydraulic performance of arc-based trapezoidal canal and cut-throat flow measurement flume, the paper carries out a comprehensive experimental study the water-measuring based on RNG k-ε turbulence model and VOF approach to the free surface by fluent6.3. Comparing the channel flow and the simulation flow, the results show that the above data coincide well and therefore the numerical simulation is effective and reliable. In determining the premise simulation accuracy, this paper analyzes the hydraulic performance on the relationship between upstream water level and discharge, the upstream Froude number, backwater height, and head loss of arc-based trapezoidal canal and cut-throat flow measurement flume with different throat contraction ratio and channel slopes. The research serve as a reference to further research and optimization promotion of the measuring flume.

The village irrigation and water conservancy facilities are the basis of rural production and living. And the effective management and protection is the key to guarantee village irrigation and water conservancy facilities operating normally. For the present stage, the small village irrigation and water conservancy facilities maintenance is seriously lagging behind the construction, this paper based on the field investigation in the two towns of Southern Jiangsu, summed up the two towns of Southern Jiangsu small village irrigation and water conservancy facilities in the management and protection of exploration and dilemma, and then analyze the root of the dilemma of small village irrigation and water conservancy facilities maintenance, and puts forward the corresponding countermeasure proposal.

Dam displacement monitoring is considered to be a grey quantity?of change in a certain range. Based on gray system theory, gray prediction model of dam displacement is often established to analyze and forecast dam displacement monitoring data sequence. On the basis of the principle of the traditional GM (1,1) forecasting model,by introducing SFLA and residual correction, the dam displacement forecasting model based on the improved non-equidistance GM (1,1) was proposed. In the analysis of dam displacement monitoring data of one project instance, the improved GM (1,1) forecasting model and the traditional GM (1,1) forecasting model were compared and analyzed. The results show that the prediction accuracy of the improved GM (1,1) forecasting model is greatly improved.

In order to study the relationship between the water noise of the rubber dam and the flow from the upstream, the plunge pool condition, it measured the water noise of the rubber dam under different plunge pool tail ridge height, different plunge pool length and different flow. The analysis results showed that the height of the plunge pool tail ridge will influence the water noise of the rubber dam while the flow and the length of the plunge pool are the same, the water noise reduces with the height of the plunge pool tail ridge increasing; the water noise reduces with the length of the plunge pool increasing while the flow from the upstream and the height of the plunge pool tail ridge are the same; the water noise increases with the flow increases while the length of the plunge pool and the height of the plunge pool tail ridge are the same.

This study aims to research on the effects of ozone disinfection on bio-stability of rural drinking water by detecting the effects of ozone disinfection on AOC and TOC of different water sources of rural water supply project and the changes of actual project in the pipe network. The results indicated that AOC increased with the increasement of ozone doses, and the bio-stability reduced in the surface water with the higher TOC (2.06 mg/L), however, the AOC reduced and bio-stability increased in underground water with the lower TOC (0.48mg/L). In addition, when the supplication concentration of ozone is low, the TOC of the surface water and underground water are increased, and when the supplication concentration of ozone is high, the TOC tended to decline with the increasement of ozone concentration. Specially, the AOC significantly changed in water pipe after ozone disinfection of rural drinking water supply. Finally, this study showed that ozone disinfection is suitable for the low TOC of source water, and in order to guaranteeing the bio-stability of drinking water supply, ozone doses should be reasonable controlled for the higher TOC of source water.

This paper presented the results of water quality in different form water tanks of rainwater harvesting for rural water supply and their seasonal changes through water sampling in field in different seasons and testing on more than 20 water quality indicators in the lab. The results showed that the water quality indicators that most likely exceeded the standard limits were turbidity, CODMn, total bacterial count, total coliforms, thermotolerant coliforms and visible matter. This indicated that rainwater harvesting water quality was susceptible to microbial contamination and organic pollution，that water tank forms and with or without cover and seasons had a great impact on the water quality stored, and that the untreated rainwater collected in the tanks could not reach drinking water standards requirements and thus there is a need to take appropriate purification and disinfection measures to ensure safety of the drinking water.

In order to improve the reliability of high speed pumps, High-speed mine rescue pump rotor system has been analyzed by SAMCEF Rotor software. The dynamic characteristics of the rotor ,such as critical speeds and vibration modes, are calculated and analyzed respectively, then the Campbell diagrams, critical speeds and vibration modes of one-dimensional beam model, the two-dimensional Fourier model and three-dimensional physical model are obtained and comparatively analyzed. The results show that the three models are basically consistent, the design avoids resonance phenomenon produced when work speeds reach the critical speeds. Critical speeds calculation method based on SAMCEF Rotor software package are more perfect, the results are more accurate . One-dimensional and two-dimensional model solving save time for their low demand for computer configuration.

Abstract: Designed 0.55D2, 0.65D2, 0.80D2 different length splitter blades, and applied to low low-specific-speed centrifugal pump. The whole flow field model of centrifugal pump with splitter blades has been established, and the characteristics of pressure pulsation were analyzed by the unsteady numerical simulation, including the radial force on impeller and volute. The results showed that, the pressure pulsation of inter flow field in centrifugal pump with splitter blades could be described major fluctuation period and secondary fluctuation period. The radial force in volute was far more than impeller’s. As the length of splitter blades became longer, the pressure pulsation amplitude and radial force fall down firstly, then they increased. The pressure pulsation and radial force of 0.55D2 of length were both less than 0.65D2 and 0.80D2. The length of splitter blades too short or long can’t be conducive to reduce the pressure pulsation and radial force.

Based on analyzing the operational risk feature of flood storage area, a risk estimation system of flood storage area was established in the paper. The system contained 16 indices of 4 aspects hased on economy risk, social risk, risk of flooding and the flood control capacity. For the complexity of the evaluation system, then it used the multi-level entropy weight model by entropy method and AHP, while achieved sequence of indices and risk level for using risk estimation of flood detention basin. The multi-level entropy weight model is used to analyze the operational risk estimation of 21 sites flood detention basin in the main stream of Huaihe River. The results show that, flooded area, population density and average submerged depth are main factors of operational risk in the indicator system; In the main stream of Huaihe River, all of the flood risks of flood areas lie at high level, and the operational risk of 4 sites flood areas are high; The operational risk of Chengxihu, Chengdonghu and Wabuhu are the high in the detention basin, and also Mengwa detention basin lie at the higher level.

Von Mises and Pearson Type III distribution are used to describe the occurrence dates and magnitudes of annual maximum flood of main streams and tributaries in Dongjiang River respectively. A bivariate joint distribution with flood encounter of main streams and tributaries in Dongjiang River.Copula Function are used to describe characteristics of the flood encountering risk. A case study suggests that the bivariate joint distribution base on Frank Copula can fit both occurrence dates and magnitudes of annual maximum flood series well;Flood encounter of main streams and tributaries in Dongjiang on the same day that may occur in June 17, suffered a risk of about 0.011%, Probability of flood encounter on the same day which prior to May 9 and after October 6 is small, close to zero; The return periods over 20years of Wangjiang river rainstorm meet with the food of main streams Dongjiang river which return periods over 5 years come to 47 years in return periods.Wangjiang rainstorm flood conditions, the probability of occurrence of a magnitude of main streams Dongjiang River flood relatively increased.

In order to study the maize of different flooding period and duration of response, for 3 consecutive years by simulation under field conditions with test pit experiments, different flooded days were set in the summer maize seedling, jointing, tasseling and grain filling stage (2, 4, 6, 8, 10d), were analyzed flooding period and duration affect the growth and yield of summer maize. The results show that, the jointing stage of Waterlogging on maize plant height and stem diameter is the largest, followed by the seedling stage, and with the flooding lasted decreased, although pre waterlogging affected, but waterlogging removed after compensation, decrease effect. Tasseling flooding early on plant height and stem diameter have influence, but after the release of waterlogging compensation effects is not obvious. To the summer maize before harvest 10d observation, compared with the control (CK), seedling stage, jointing stage and tasseling flooding made the average plant height was decreased by 0.48% -18.76%, 1.22%-36.18%, 3.06- 6.83. At the seedling stage and jointing stage of flooding made the average stem diameter decreased by 2.23%- 20.01%, 1.31%- 44.79%. The jointing stage waterlogging of leaf area index (LAI) of the greatest impact, followed by seedling stage, tasseling and grain filling stage, and LAI with the flooding lasted decreased, according to the growth period of flooding after 20d and CK during the same period, seedling, jointing, tasseling and filling water flooded the average respectively. From 35.10% - 80.71%, 10.90% - 97.77%, 4.40-74.17, -1.14% - 50.98%. When the seedling, jointing and tasseling filling stage waterlogging flooding more than 4D, more than 6D, which will significantly cut, the reduction rates were 12.30%, 15.58%, 18.23% and 11.85%, visible, before the filling stage are the critical period of maize production on waterlogging, drainage and waterlogging reduction measures should be taken. This study will provide a theoretical basis for the rational design of a drainage scheme in summer maize farmland, loss assessment of a flood disaster, and improvement of disaster prevention and mitigation.

New design methods were adopted in SongBung 4 hydropower plant in Vietnam, which were different from the traditional ones used in China. The hydraulic Dynamometer was used for the loading test of the bridge crane; A new backhauling system was invented for the equipment transporting from outside to the inside of powerhouse; The water source of fire-fighting system was taken from surge shaft; The sewage water was separately drained and treated by the oil contaminated water treatment equipment. Besides, the typical problem happened to the auxiliary system during debugging were introduced. The design methods brought economic benefit for the hydropower plant and could spread among other plants.

In the design of power collaborative simulation, the 3D models of power equipments would be transferred among different sites. The data of 3D models is very big, as thus, when a site requests some 3D models from the other site, the transferring efficiency is very low which reduces the simulation efficiency and effect seriously. As thus, a level-based peer to peer scheduling algorithm of 3D models in the design of power collaborative simulation is presented in this paper. According to the different fragments in different sites and different transferring time, that algorithm schedules the transferring of 3D model fragments level based which realizes the fast transferring of 3D model