New Concepts for Water Well Screen Opening and Gravel Pack Size
Issue:
Volume 6, Issue 4, December 2020
Pages:
104-111
Received:
16 September 2020
Accepted:
12 October 2020
Published:
30 October 2020
Abstract: The purpose of the study to obtained well screens opening size and gravel packs size, and to access within the groundwater inter through the aquifer to the well screen and prevent running sand from entering the well. The use of properly designed screen and gravels are important and this paper is an important reference for the design of groundwater wells. In this study, the purpose of the circle method is to design water well and the benefits of sand control. The determination of screen slot size and its variation in the opening is often a major aim of hydrogeological studies. However, measurement of hydraulic conductivity (K) at a high spatial resolution in sedimentary aquifers is a challenge. One commonly used approach is to estimate slot size from grain size analysis. The objectives of this study are to compare between curve of grain size analysis, bar graph and circle method used applied different formulas for the determination of slot size from grain-size data and to evaluate how well this method predicts slot size and gravel pack. Correlation between the mechanical analysis curve, bar graph and the circle methods were found for the used applied different formulas. Based on circle results, the applied circle formulas appear to be suitable for an initial assessment of aquifer properties. However, considering the difference in calculated aquifer parameter values, results are smaller significantly and reliable for the high analysis of aquifer materials.
Abstract: The purpose of the study to obtained well screens opening size and gravel packs size, and to access within the groundwater inter through the aquifer to the well screen and prevent running sand from entering the well. The use of properly designed screen and gravels are important and this paper is an important reference for the design of groundwater ...
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Study on Inheritance Gene of Ecological Civilization in Ancient Water Control Works of Zhejiang Province
Issue:
Volume 6, Issue 4, December 2020
Pages:
112-120
Received:
21 November 2020
Accepted:
8 December 2020
Published:
16 December 2020
Abstract: It is very difficult to directly judge whether a new water conservancy project meets the requirements of ecological civilization. Based on the knowledge of engineering, archaeology, economics and history, this paper studies the ancient water control engineering by means of comparative analysis, literature review, field investigation, case study, simulation restoration and model demonstration. This paper explores the inheritance genes of water ecological civilization from three dimensions: water philosophy, engineering technology and institutional arrangements. It holds that network flow is the gene of water ecological civilization inherited by ancient water control works in China. Network flow — a flow of resources, economy, culture and value — realizes, to a great degree, the water control goals of physical grooming, economic equilibrium and ecological prudence. From the perspective of water philosophy, it displays a traditional philosophy which is systematic, prudent and dialectical. In terms of engineering technology, network flow uses astronomical-geographic information complex system to plan water sources, design structures to utilize hydro energy, regulate water quality, protect aquatic organisms, so as to form a natural-artificial water system network. In view of institutional arrangements, it constructs a hierarchical system at national, local and private levels, integrating the water conservancy practices of ancient Chinese and the essence of the traditional culture and ideology.
Abstract: It is very difficult to directly judge whether a new water conservancy project meets the requirements of ecological civilization. Based on the knowledge of engineering, archaeology, economics and history, this paper studies the ancient water control engineering by means of comparative analysis, literature review, field investigation, case study, si...
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