NAPL source zone depletion model and its application to railroad-tank-car spills

We developed a new semi-analytical source zone depletion model (SZDM) for multicomponent light nonaqueous phase liquids (LNAPLs) and incorporated this into an existing screening model for estimating cleanup times for chemical spills from railroad tank cars that previously considered only single-component LNAPLs. Results from the SZDM compare favorably to those from a three-dimensional numerical model, and from another semi-analytical model that does not consider source zone depletion. The model was used to evaluate groundwater contamination and cleanup times for four complex mixtures of concern in the railroad industry. Among the petroleum hydrocarbon mixtures considered, the cleanup time of diesel fuel was much longer than E95, gasoline, and crude oil. This is mainly due to the high fraction of low solubility components in diesel fuel. The results demonstrate that the updated screening model with the newly developed SZDM is computationally efficient, and provides valuable comparisons of cleanup times that can be used in assessing the health and financial risk associated with chemical mixture spills from railroad-tank-car accidents.     

临南北部地区岩性油藏地震描述方法应用研究

临南坡折带北部岩性油藏分布受构造、岩性双重因素控制,在开展岩性油藏空间分布研究过程中,以高分辨率地震处理资料为基础,精细准确的层位标定为纽带,利用Stratmagic地震相分析、Jason反演、Epos3.0分频属性等多种地震解释手段,对有利砂体的展布、含油气的分布进行描述,直观刻画了岩性在空间上的分布规律,为该区的岩性圈闭识别和井位部署提供重要依据。     

Contaminant plume classification system based on mass discharge

Estimation of mass discharge has become an increasingly valuable analysis technique at sites with contaminated groundwater plumes. We propose a simple plume magnitude classification system based on mass discharge comprised of 10 separate magnitude categories, such as a "Mag 7 plume." This system can be a useful tool for scientists, engineers, regulators, and stakeholders to better communicate site conceptual models, prioritize sites, evaluate plumes both spatially and temporally, and determine potential impacts.     

胶南局坚持依法行政争创一流业绩

2010年,胶南市国土资源局以完善促进科学发展观、建立土地管理新机制为核心,以保护资源、保障发展、维护权益、服务社会为目标,全力保障扩大内需项目用地,加强建设用地计划和审批管理,促进依法管地和科学用地,落实土地监管共同责任,强化执法监察动态巡查,取得良好成效。     

震源复杂性的常规估计方法：用于1992年10月18日哥伦比亚地震

本文介绍两种适用于远震记录的方法，来表征地震事件的时间进程。叠加由大的区域台阵记到的短周期信号可获得震源高频辐射的稳定估计；而对经验格林函进行反褶积则可获得适用于分析破裂复杂和破裂时空间尺度的可靠的宽带震源时间函数。