超长电磁波技术在城市地热资源勘察中的应用-以郑州市老鸦陈地热田为例     

谢山立  袁广祥 《地质与勘探》2012,48(5):1016-1022

在进行地热资源勘察中,地球物理方法是很重要的,尤其是在城市中。以郑州市老鸦陈地热田为例,利用超长电磁波技术进行城市地热资源的勘察。首先根据已有的钻孔,建立地层和热储异常解释的标志曲线;其次,根据郑州的地质条件,布置10个测点;最后,根据标志曲线,对各测点的地层、断层和热储异常进行解释。勘察结果表明,郑州地热田主要由三种类型：西南浅部基岩中的地热水、基岩顶面以上地热水、深部基岩中的地热水。  相似文献   

Hydrogéochimie et géothermométrie: apports à l'identification du réservoir thermal des sources de Hammam Righa,Algérie     

Fatima Zohra Bouchareb-Haouchine  Abderrahmane Boudoukha  Abdelhamid Haouchine 《水文科学杂志》2013,58(6):1184-1195

Résumé

Afin d'identifier le système hydrothermal de la région de Hammam Righa (Algérie), une étude hydrogéochimique et géothermométrique a été effectuée. Un tableau détaillé de l'hydrogéochimie des eaux a été dressé à partir des analyses en éléments majeurs. Deux faciès hydrogéologiques ont été ainsi identifiés: HCO₃-Ca et SO₄-Ca. Ceci est contrôlé par, respectivement, les interactions avec les calcaires jurassiques conduisant à la dissolution des carbonates et la présence d'évaporites (Trias) le long du circuit de remontée des eaux. Les eaux émergent à travers un système de fractures profondes et récentes. Les températures des sources varient de 26 à 68°C, caractérisant ainsi un thermalisme de basse enthalpie. L'application de différents géothermomètres donne des températures allant de 70 à 110°C pour le réservoir thermal. L'analyse de ces résultats, confrontée au gradient géothermique de la région, permet l'identification des calcaires jurassiques comme réservoir thermal où les eaux ont circulé à des profondeurs de plus de 1800 m.

Editeur Z.W. Kundzewicz

Citation Bouchareb-Haouchine, F.Z., Boudoukha, A., et Haouchine, A., 2012. Hydrogéochimie et geothermometrie: apports à l'identification du réservoir thermal des sources de Hammam Righa, Algérie. Hydrological Sciences Journal, 57 (6), 1184–1195.  相似文献   

Precipitation in tropical America and the associated sources of moisture: a short review     

A.M. Durán-Quesada  M. Reboita  L. Gimeno 《水文科学杂志》2013,58(4):612-624

Abstract

Understanding of the relationship between precipitation and the associated sources of moisture is essential to the improvement of our comprehension of the global water cycle. The observation of precipitation is one of the major challenges in the study of climate, as is the proper assignment of the sources of moisture that account for that precipitation. A stark contrast in the amounts of available information on precipitation may be seen in the cases of Central America and the northern part of South America. The main areas of precipitation in tropical America are described, and the moisture sources for these areas are identified by means of a Lagrangian approach presented with an example application. A strong relationship exists between the identified sources of moisture and the distribution of precipitation in the locations in question. The Caribbean Sea and the tropical Atlantic are highlighted as the main sources of moisture for the regions of highest precipitation in tropical America. Regional low-level winds play a major role in transport of moisture from the adjacent oceanic regions.

Editor Z.W. Kundzewicz

Citation Durán-Quesada, A.M., Reboita, M. and Gimeno, L., 2012. Precipitation in tropical America and the associated sources of moisture: a short review. Hydrological Sciences Journal, 57 (4), 612–624.  相似文献   

Sediment flux into the sea as influenced by different source areas in the drainage basin: example of the Yellow River,China     

XU JIONGXIN 《水文科学杂志》2013,58(2):187-202

Abstract

The runoff and sediment of large rivers usually come from different source areas, which make different contributions to the sediment flux into the sea. This has been studied with the example of the Yellow River in China, whose suspended sediment flux into the Bohai Sea accounts for 19.4% of the world total. The drainage basin of this river can be divided into four major water and sediment source areas. The sediment flux into the sea is found to be closely related to the water and sediment from the different source areas in the drainage basin and, accordingly, an empirical regression model has been established to express this relationship. According to this model, in each tonne (t) of sediment from the fine sediment producing area (FSA), 0.85 t (for yearly series) and 0.72 t (for event series) can be transported into the sea; in each tonne of sediment from the coarse sediment producing area (CSA), only 0.21 t (for yearly series) and 0.34 t (for event series) can be transported into the sea. Since the 1970s, the Yellow River's sediment flux into the sea has declined markedly and this reduction can be attributed to a great degree to the soil control measures in the fine sediment producing area. Coupling the models of this study to the previously established models for estimating the impacts of soil control measures on water and sediment balance in the Yellow River basin, a quantitative prediction may be made for the change of sediment flux into the sea that might result from climate change and human activities in the future.  相似文献   

Identifying the origin of groundwater for water resources sustainable management in an arid oasis,China     

Xiaoyan Guo  Jianhua Si  Yongping Wei  Ting Bao  Haiyang Xi 《水文科学杂志》2013,58(10):1253-1264

ABSTRACT

Many oases are experiencing severe groundwater depletion due to increased population, expanding agriculture and economic development. For sustainable development, quantifying groundwater recharge resources are fundamentally important. In this study, stable isotope techniques were employed to identify recharge sources of groundwater and quantitatively evaluate their contribution ratios in the Dunhuang Oasis, northwest China. Our findings indicate that heavy isotopes in shallow groundwater are more negative than those in deep groundwater, which is attributed to shallow groundwater that was modern and deep groundwater that was old. Irrigated return water and lateral groundwater flow from the Qilian Mountains are considered as the two main sources of shallow groundwater, accounting for 35% and 65% of the total recharge, respectively. Thus, as the main groundwater source of the Dunhuang Oasis, the Qilian Mountain Front should be protected against over-exploitation. Our results provide not only fundamental knowledge for groundwater management of aquifers of the Oasis, but also valuable water management information for other similar arid oases worldwide.  相似文献   

Visualizing aerial wildlife movements: Internet sources of Doppler radar for the classroom     

Emariana S. Taylor  David R. Butler 《国际地球制图》2013,28(4):247-258

Doppler radar imagery is a useful classroom tool for studying the movement and spatio-temporal distribution of animals. In this paper we present a basic introduction to Doppler radar and the base products used to garner biological and geographical data. We draw upon imagery depicting bat and avian movements to illustrate how radar imagery may be beneficially used in the classroom to examine habitat use and species distribution at the landscape scale. Additionally we provide references for data acquisition and real-time animated imagery available on the Internet. We hope the information and imagery provided here will help instructors enrich the classroom experience for their students, while at the same time demonstrating real-world applications for the use of radar imagery in biogeographic studies.  相似文献   

基于卷积神经网络的海洋地震勘探拖缆混采数据分离     

童思友  王凯  尹文笋  胡伟 《中国海洋大学学报(自然科学版)》2021,(5)

近年来,混合震源采集技术在海洋勘探中发展迅速,由于其高效的采集方式,以及能够获取高质量的地震数据而受到青睐。对混合震源数据进行有效的混采分离是混合震源采集技术成败的关键,本文结合近年来发展火热的卷积神经网络(CNN)方法并根据地震资料的特点,提出了一种基于神经网络模型的数据驱动混采分离方法。通过制作的两万余个样本的混采数据集进行训练,获得混采分离模型,通过测试集的试验以及与常规混采分离方法进行对比,结果表明本文采用的CNN混采分离方法具有较高的分离精度,且效率很高。  相似文献   

气提工艺在原油稳定装置中的应用研究   总被引：2，自引：0，他引：2  

王念兵  宋丹 《中国勘察设计》2009,(3):49-52

原油稳定工艺是国内各大油田普遍实施的降低油气蒸发损耗、实现油气密闭集输、提高轻烃收率的重要措施。本课题结合中原油田原油稳定装置运行现状及存在的问题,进行了气提工艺在原油稳定装置中的技术改造和应用研究,以降低装置运行费用,提高轻烃回收率,使中原油田的原油稳定工艺达到一个新的水平。  相似文献   

河南熊耳山地区金矿的控矿因素分析   总被引：2，自引：1，他引：1  

李连涛  徐公权  王爱枝 《矿产与地质》2009,23(2)

熊耳山地区金矿的成矿物质来源主要来自基底太华群中深成变质岩、燕山期钙碱性岩浆岩以及构造蚀变岩。矿床受燕山期岩浆岩和构造控制明显,不同级别的构造控制着金矿的规模和展布。控矿断裂具有明显的方向性,断裂交汇处及断面产状变化处控制矿体或富矿体产出。文章从花岗岩特征和构造的控矿作用方面总结该区金矿的成矿规律,以期为进一步找矿提供借鉴。  相似文献   

北京一次大暴雨过程视热源和视减湿特征分析   总被引：1，自引：0，他引：1  

郭幼君 《气象》2000,26(11):7-13

应用高分辨ＴＢＢ亮温资料和逐６小时一次的ＮＣＥＰ／ＮＣＡＲ再分析资料,分析了１９９８年７月５日北京地区发生的一次大暴雨天气过程。结果表明：北京地区雨量分布不均是由于西部山区出现两次对流活动而东部平原地区仅为一次,ＴＢＢ低值区右前方下沉区有利于其后部对流的发展;暴雨阶段视热源（Ｑ１）的视减湿（Ｑ２）局地变化项和平流项均非小项,两者具有反位相变化特征,垂直输送项是视热源和视减湿的主要贡献者;Ｑ１和Ｑ２  相似文献