Advanced Materials Research Vols. 864-867

Abstract: In order to meet the projected water needs of Shandong Province in the future, the system dynamics model of water cycle system is designed. The system dynamics model of water cycle system consists of three sub-models: population growth model, water demand model and water supply model. We use the logistic growth model to forecast the population in population growth model, use the water price elasticity of water demand to show how water usage responds to price change, and analyze the desalinization rate and the purification rate of water to meet water supply. In addition, by using System Dynamics modeling software, various types of models for water cycle analysis can be simulated. The model output shows this effect clearly..

Abstract: The application of water retaining agent could evidently improve water use efficiency. The WUE was increased with the duration of using water retaining agent, compared with the control, it increased 5 to 11 times with the duration of 8 to16d, and the growth (eg. height, the ratio of shoot to root, and yield et al) and physiological indices (eg. root activities and chlorophyll contents) were not affected. Moreover, compared with the control, the proline content increased 3 times, which showed that the application of water retaining agent improve the drought resistance, and the maximum threshold was 16d for keeping the normal growth of Hemarthria compressa in this study.

Abstract: Danjiangkou Reservoir and its upstream tributaries as water resource area is of strategic importance for the Mid-route of South-to-North Water Transfer Project. Water conservation and water purification is the key measures for sustainable water diversion. Green water management as a new technologies to achieve water conservation and water purification has a broad application prospects. In this research, green water management was studied in the Upper Du watershed. ArcSWAT model was used to assess quantity of green water resource. By adjusting the model parameters, the efficiency of different green water management scenarios on water and soil conservation were simulated. The results of the study indicate that the quantity of green water in the Upper Du is about 5.588 billion cubic meters. Mulching is a better green water management way that more suitable for water and soil conservation in the Danjiangkou Water Resource Area. This research can provide a reference for water resource protection and management in Water Resource Area of the Mid-route of South-to-North Water Transfer.

Abstract: This paper presents a method for selecting indexes based on cloud model. The natural language qualitative evaluation of water resources utilization efficiency (WRUE) indexes from several experts were converted into quantitative score values. The randomness and fuzziness of conversion process could be fully reflected. Based on the basic index set of WRUE and fifty experts` comments, cloud model was used to calculate each index`s value. Finally, eight indexes covering overall, agricultural, industrial and living industry were selected to construct the evaluation index system. Cloud model is convenient, objective, and the calculation process is simple. The construction of evaluation index system lays a good foundation for the evaluation of WURE.

Abstract: To objectively evaluate the resettlement implementation effect of migration which resulted from the development of hydroelectric energy, through the combination of field investigation and the interior work plenty monitoring and evaluation data concerning resettlement of Sui County in China has been collected, and according to the characteristics of resettlement work resettlement implementation effect evaluation indexes have been selected. To optimize indexes whose number and category are complex and deal with the porblem of weighting indexes subjectively, principal component analysis (PCA) is applied to reduce the evaluation index dimensions and to extract the principal component indexes, combining with the entropy weight method to objectively weight the indexes. Case study of Sui County shows that the method can quantitatively give each immigrant village a comprehensive resettlement effect score, and provide theoretical basis for subsequent resettlement management decision-making, it also contribute to the harmony and stability in the resettlement area and the sustainable development of hydropower.

Abstract: Estimating groundwater recharge and groundwater discharge are key components in determining the sustainable utilization of groundwater resources. Infiltration recharge by rainfall and irrigation water recharge are the main supply of groundwater in the study area. In this paper, based on the hydrological budget method, we analyzed, the utilization of groundwater resources, calculated, the recharge and excretion of groundwater in the study area from 1995 to 2012, and finally, pointed out the groundwater level is mainly affected by the irrigation water. Therefore, readjustment of the structure of plant is to ensure the ecological environment, utilize rationally the groundwater resources and achieve the goal of sustainable use of groundwater resources.

Abstract: Water resources projects are key underpinnings of regional drought coping strategies. It is of great importance to optimize the overall arrangement and water resources allocation to tap the potentials of water resources projects in coping with droughts, and therefore to enhance the regional drought coping capacity. The definition of water resources projects was firstly given and then the connotation of drought coping capacity of the projects as well as drought coping mechanism, were systemically analyzed in this paper. Furthermore, a general technological framework of study on drought coping capacity assessment of water resources projects was proposed. Finally, some key scientific issues including drought risk assessment and carrying capacity of water resources under drought conditions, drought coping capacity assessment of water resources projects, optimization for drought-oriented water resources allocation and dispatching, and the drought coping management, were discussed.

Abstract: When a reservoir is built, it will change the hydraulic features of the natural river, and cause thermal stratification which has significantly influence on the reservoir area and downstream ecological environment. Through analysis of the temporal and spatial variations of the observed temperature in terms of the prototype temperature observations in Ertan reservoir, the preliminary conclusions can be gained as follows: the water temperature distribution in Ertan reservoir is basically represented as isothermal in the same depth plane, and as stratifies along water depth. The great monthly variations of water-temperature in the reservoir are affected by the air temperature obviously.

Abstract: Starting from the function of water resources to the social economic development, using the method of vector module, this thesis makes the analysis and evaluation of Enshi water resource carrying capacity. The results show that the water resource carrying capacity maintain its wide between 0.0884 to 0.1275 in 2007-2011, which shows that the carrying capacity of water resource in Enshi can meet the needs of social economic development.

Abstract: This paper reviews the analytical solutions for the impact of land reclamation on the ground water level and the saltwater interface with unconfined groundwater conditions in coastal aquifers. The applicability of the analytical solutions is somewhat limited by assumptions such as Dupuit-type flow and the Ghyben-Herzberg relation. Variable-density flow and solute transport simulations conducted by the numerical code FEFLOW were used to evaluate the accuracy of these analytical solutions. Three field-scale hypothetical cases were simulated for the numerical verification. The results show that a seepage face occurs in the numerical results rather than in the analytical solutions, but only minor difference occurs between the numerical and analytical solutions. This implies that the analytical solutions are reasonable despite the used assumptions.