Investigation on rules of groundwater and salt dynamical in Luohui trench irrigation district
Journal Title: Science Paper Online - Year 2007, Vol 2, Issue 2
Abstract
To comprehend the rule of groundwater dynamical thoroughly is one of the basic theories to solve the problems of the soil salinization and ground water pollution. Based the geology and physiognomy about Luohui trench, this research divides the entire irrigation area into three terraces. Monitors the groundwater and salt dynamical on the spot in 2005, and uses the“Two-Way ANOVA”methods, analyzes concretely the change of groundwater conductivity along with the groundwater depth in differ times and vary from distributing condition. The result indicates, the variation of groundwater conductivity has a great relationship with the water level, and demonstrates very strong regional characteristic: Each terrace EC value increases with rising of the water level, high EC value appears in the high water level area, the conductivity of high water level of the first terrace exists a variation. But the outside factors include the micro-region environment, the human movements and the climate also can affect the groundwater and salt dynamical process. Therefore, reduces the water level of this irrigation district is the important measure to control the soil salinization and the key to realize the agriculture development.
Authors and Affiliations
Xia Zhang, Zhanbin Li , Peng Li
Model reduction using BPOD and its application to aeroelastic active control
It is badly limited to apply optimization and control into fluid dynamic system as its high-dimensional and nonlinear characteristic. Model reduction technique is a powerful tool to solve the problem. In this paper, the...
重力坝应力的临界能量误差限自适应有限元分析
本文应用自适应有限元法对重力坝应力的能量误差限进行了研究。通过对不同坝高,不同上游、下游坡比等多种形状重力坝坝体的应力分析,得出在重力坝应力分析过程中存在临界能量误差限,该误差限对不同坝体外形会有微小变化。该结果将会有助...
纳米雷达吸波材料的研究
本文利用电波暗室对三种不同的纳米材料涂层进行吸波效能测试。结果表明,以纳米SiC粉末和纳米Fe3O4粉末制成的复合吸波涂层对8 : 18GHz雷达波具有较好的吸收效果,整体小于-10dB的带宽接近4.2GHz,吸收峰值为-15.3 dB;同时其具有较小的...
不同掺杂二氧化钛的电子和晶体结构与<br /> 光催化性能的关系<br />
对未掺杂、氮掺杂、碘掺杂和铂掺杂的锐钛矿TiO2进行了第一性原理计算。结果表明,三种掺杂TiO2带隙中都产生新的能带。这些新出现的能带是掺杂TiO2响应可见光的原因。而且铂掺杂TiO2的带隙缩小,响应波长更宽。铂掺杂和碘TiO2的能带位置明...
SiCf/Ti基复合材料的界面反应
SiC纤维增强Ti基复合材料(SiCf/Ti)在航空航天领域有重要应用前景,但在SiC纤维和基体钛合金之间存在的界面反应,使复合材料的性能受到一定的损害。本文采用透射电镜、扫描电镜和X射线衍射分析SiCf/Ti基复合材料界面反应产物的微观组织...