Numerical Modeling of Shallow Water Table Behavior with Lisse Effect

来源 :Chinese Geographical Science | 被引量 : 0次 | 上传用户:leeo_1987
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Air entrapment is an important consideration in environments with shallow water tables and sandy soil, like the condition of highly conductive sandy soils and flat topography in Florida, USA. It causes water table rises in soils, which are significantly faster and higher than those in soils without air entrapment. Two numerical models, Integrated Hydrologic Model (IHM) and HYDRUS-1D (a single-phase, one-dimensional Richards′ equation model) were tested at an area of west central Florida to help further understanding the shallow water table behavior during a long term air entrapment. This investigation employed field data with two modeling approaches to quantify the variation of air pressurization values. It was found that the air pressurization effect was responsible at time up to 40 cm of water table rise being recorded by the observation well for these two models. The values of air pressurization calculated from IHM and HYDRUS-1D match the previously published values. Results also indicated that the two numerical models did not consider air entrapment effect (as the predictive parameters remain uncertain) and thus results of depth to water table from these models did not compare to the observations for these selected periods. Incorporating air entrapment in prediction models is critical to reproduce shallow water table observations. Air entrapment is an important consideration in environments with shallow water tables and sandy soils, like the condition of highly conductive sandy soils and flat topography in Florida, USA. It causes water table rises in soils, which are significantly faster and higher than those in soils without air entrapment. Two numerical models, Integrated Hydrologic Model (IHM) and HYDRUS-1D (a single-phase, one-dimensional Richards’ equation model) were tested at an area of ​​west central Florida to help further understanding the shallow water table behavior This was used with field data with two modeling approaches to quantify the variation of air pressurization values. It was found that the air pressurization effect was responsible at time up to 40 cm of water table rise being recorded by the observation. well for these two models. The values ​​of air pressurization calculated from IHM and HYDRUS-1D match the previously published values. indicated that the two numerical models did not consider air entrapment effect (as the predictive parameters remain uncertain) and thus results of depth to water table from these models did not compare to the observations for these selected periods. Incorporating air entrapment in prediction models is critical to reproduce shallow water table observations.
其他文献
不管是伽利略,还是牛顿,他们都为物理学带来了奇迹。在伽利略的相对性原理中,详细地阐述了运动与静止不是绝对的,而是具有一定的相对性。本文从伽利略相对性原理、学习伽利略
慢性窦道在外科临床工作中较常见,处理困难且效果差,笔者用高渗糖行窦道周围注射治疗慢性窦道10例,方法简便,疗效尚佳。1.方法:搔刮、清除异物和坏死组织后彻底冲洗,有脓性
汉语拼音的教学在小学低年段相当重要,新入学的一年级学生,在初接触抽象的拼音符号的同时就要学习四声声调,从掌握读音、识记书写到辨识理解,给学生带来困扰,而这困扰会持续
新产业革命的战略机遇是否会不请自来?有学者认为,从历史上多次产业革命转移的路径考察发现,有一个共同点,即都是由岛国向半岛国家,再向大陆国家和地区渐次扩张的。在亚洲,先
美声唱法源于欧洲,是一种科学的唱法,已经被欧洲声乐艺术家证实是一种具有表达不同民族风格声乐艺术作品可行性与完美性的艺术。美声唱法作为一种声乐艺术不仅影响着中国声乐艺术的发展,还影响着世界其他国家声乐艺术的发展。美声艺术在中国的发展需要走与中国民族声乐艺术相结合的道路,并在发展过程中不断创新,才能保持旺盛的生命力,促进中国美声艺术的发展。  【关键词】中国;美声艺术;发展创新  美声唱法是一种混合声
在新时期的背景下,科学技术不断发展,学生思维受到很大的影响,旧的教学方式相对不能满足如今的课堂要求。如何能让新的教学方式与旧的教学方式相适合,如何能更有效的提高课堂
埕海油田地质条件复杂,沉积类型多,储层纵横向变化快,油藏类型复杂多样,储层精细预测难度大。针对储层预测的难题,使用多种技术手段来解决储层研究的多解性,如应用地震属性分
鼻窦炎可以经下列方式引起眼眶并发症。①感染直接扩散:眼眶上、下壁分别构成额窦 Sinusitis can cause orbital complications in the following ways. ① direct spread
睫状体平坦部的玻璃体切割术需要充分暴露视网膜和玻璃体,以便安全、成功地切除病变。目前虽已提出通过括约肌切开术或扇形虹膜切除术来解决这个问题,但这都能增加术中出血
随着新课改理念的不断深入,素质教育成为校园教育的重点内容,其中主要内容就是创新和发展,因此各个学科的教学也走上了改革的道路.本文就是针对高中阶段语文教育工作的开展进