黔西南丘峰谷地区岩溶水资源量计算方法探讨

贵州省黔西南为典型的丘峰谷地区,该区域地表水系不发育,水文地质条件复杂,地下水资源量计算研究程度不高。为摸清区内地下水资源量状况,采用大气降水入渗法、地下水径流模数法、流量汇总法、水力坡度法和给水度计算法,基于岩溶水系统为计算单元,对丘峰谷地区岩溶水系统地下水资源量进行计算,对比分析计算结果,并判定各计算方法对岩溶大泉系统和储水构造系统的地下水资源量计算的适宜性,结果发现:在计算过程中,岩溶大泉系统应以流动系统为计算单元,宜采用大气降水入渗法和流量汇总法;而应用地下水径流模数法和水力坡度法计算储水构造岩溶含水系统资源量,具有相似性、保证率高。研究结果对类似水文地质条件下的岩溶山区地下水资源量计算具有重要意义。     

基于氟离子含量分区的地下水资源量计算探讨

地下水资源量计算是水文地质工作中十分重要的一个方面。以往对某地区的地下水资源量计算大部分以矿化度分区进行分类计算。本文结合山东省高密市多发地氟病的特点,按照氟离子含量分区进行分类计算,探讨因地制宜的地下水资源量计算方法。     

苏州-无锡-常州地区浅层地下水系统可采资源量评价

苏州-无锡-常州地区超量开采深层地下水已引起严重的地质灾害,因此对该地区浅层地下水资源进行科学评价,查明其可开采资源量十分重要.通过对苏州-无锡-常州地区浅层地下水水文地质条件和沉积特征的研究,将浅层地下水划分为4个子区,分析了各子区的特征及补给、径流、排泄条件,并运用GMS软件对全区浅层地下水进行了数值模拟,在给定的水位约束条件下,得出该区可持续开采水资源量为10.57×108 m3/a.     

数值法在计算地下水补给资源量中的应用

为计算XX矿区拟建供水水源地的地下水补给资源量,在分析矿区地质及水文地质条件的基础上,通过对边界条件、含水层及地下水流动状态进行概化,建立水源地的水文地质概念模型,通过抽水试验动态资料对数值模型进行识别,通过均衡分析,计算获得区内地下水补给资源量为18 091.59 m3/d。     

风险分析在地下水资源量评价中的应用

对地下水资源量进行准确的评价是对地下水资源进行有效开发利用和科学管理的前提和基础,但由于各地区的地形,地质,水文地质等条件存在差异,以及区域地下水资源开发利用规划管理特点的不同,决定了地下水资源评价在一定程度存在着不确定性因素.本文以镇江市谏壁--大港地区岩溶水资源量评价为例,运用风险分析原理对其评价结果进行风险定量分析,在此基础上,提出区域地下水开发利用的可持续性方案.     

营口地区水资源状况分析

通过地理位置、水资源状况、水质状况等方面分析营口地区水资源状况。水资源分别包括降水量、地表水资源量、出入境水资源量、地下水资源量和水资源总量。水质状况包括废污水及主要污染物排放量、饮用水源区水库及富营养化状况和地下水水质。通过对水资源状况的分析,提出存在问题。     

周台子水源地地下水资源量评价方法

结合定边县周台子水源地供水水文地质勘察工作,从水源地水文地质特征、地下水补给量及储存量确定、允许开采量计算等方面对该水源地地下水的资源量进行了评价。     

济宁地区北部岩溶地下水资源计算与潜力评价

济宁地区北部赋存有较丰富的岩溶地下水,目前已纳入当地开发利用规划。为防止过量开采引发不良环境地质问题,对该岩溶系统的资源潜力进行了科学评价。在查明济宁地区北部水文地质条件的基础上,利用水量均衡法与数值模拟法对该区岩溶地下水资源量进行了计算,通过分析地下水资源潜力模数,该区岩溶地下水资源潜力较大。     

酒泉东盆地地下水资源及潜力评价

在对酒泉东盆地水文地质条件、地下水赋存特征、地下水开采现状进行系统研究的基础上,计算评价盆地内地下水天然补给资源量、天然排泄资源量、储存资源量;以行政区和灌区为单元,计算地下水允许开采量,并进行各灌区地下水开采潜力评价和开发利用规划,划分可增加开采、控制开采、调减开采和尚难利用规划区。     

镇赉县镇南种羊场水资源概况分析

阐述镇南种羊场水文地质条件及含水层的特征,计算出地下水资源量,提出了地下水天然资源量的概念与计算方法。     

The terrestrial fauna of the Late Triassic Pant-y-ffynnon Quarry fissures,South Wales,UK and a new species of Clevosaurus (Lepidosauria: Rhynchocephalia)

Pant-y-ffynnon Quarry in South Wales yielded a rich cache of fossils in the early 1950s, including articulated specimens of new species (the small sauropodomorph dinosaur Pantydraco caducus and the crocodylomorph Terrestrisuchus gracilis), but no substantial study of the wider fauna of the Pant-y-ffynnon fissure systems has been published. Here, our overview of existing specimens, a few described but mostly undescribed, as well as freshly processed material, provides a comprehensive picture of the Pant-y-ffynnon palaeo-island of the Late Triassic. This was an island with a relatively impoverished fauna dominated by small clevosaurs (rhynchocephalians), including a new species, Clevosaurus cambrica, described here from a partially articulated specimen and isolated bones. The new species has a dental morphology that is intermediate between the Late Triassic Clevosaurus hudsoni, from Cromhall Quarry to the east, and the younger C. convallis from Pant Quarry to the west, suggesting adaptive radiation of clevosaurs in the palaeo-archipelago. The larger reptiles on the palaeo-island do not exceed 1.5?m in length, including a small carnivorous crocodylomorph, Terrestrisuchus, and a possible example of insular dwarfism in the basal dinosaur Pantydraco.     

The effect of water on accessory phase solubility in subaluminous and peralkaline granitic melts

The solubilities of columbite, tantalite, wolframite, rutile, zircon and hafnon were determined as a function of the water contents in peralkaline and subaluminous granite melts. All experiments were conducted at 1035 °C and 2 kbar and the water contents of the melts ranged from nominally dry to approximately 6 wt.% H₂O. Accessory phase solubilities are not affected by the water content of the peralkaline melt. By contrast, solubilities are affected by the water content of the subaluminous melt, where the solubilities of all the accessory phases examined increase with the water content of the melt, up to 2 wt.% H₂O. At higher water contents, solubilities are nearly constant. It can be concluded that water is not an important control of accessory phase solubility, although the water content will affect diffusivities of components in the melt, thus whether or not accessory phases will be present as restite material. The solubility behaviour in the subaluminous and peralkaline melts supports previous spectroscopic studies, which have observed differences in the coordination of high field strength elements in dry vs. wet subaluminous granitic glasses, but not for peralkaline granitic glasses. Lastly, the fact that wolframite solubility increases with increasing water content in the subaluminous melt suggests that tungsten dissolved as a hexavalent species.     

Quaternary stresses revealed by calcite twinning inversion: insights from observations in the Savonnières underground quarry (eastern France)

Calcite samples were extracted both from the rock matrix and the superficial coating of a karstified fault plane of an underground quarry, located in the eastern border of the Paris basin. The karstification is dated as Quaternary. Analysis of mechanical calcite twinning reveals that only the calcite matrix has also undergone a compression trending WNW that can be attributed to the Mio-Pliocene alpine collision. Both coating and matrix have undergone a strike-slip regime with σ₁ roughly trending north–south, that could correspond to the regional present-day state of stress, a strike-slip compression rather trending NNW, modified by local phenomena. To cite this article: M. Rocher et al., C. R. Geoscience 335 (2003).     

HYDROGEOLOGY

正20141756 Chen Ruige(Mathematical College,China University of Geosciences,Beijing100083,China);Zhou Xun Numerical Simulation of Groundwater Level Fluctuation in a Coastal Confined Aquifer with Sloping Initial Groundwater Level Induced by the Tide(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(7),2013,p.1099-1104,6 illus.,16 refs.) Key words:confined water,groundwater level     

METAMORPHIC PETROLOGY

正20141408 Cai Jia(Institute of Geology,Chinese Academy of Geological Sciences,Beijing100037,China);Liu Fulai Petrogenesis and Metamorphic P-T Conditions of Garnet-Spinel-Biotitebearing Paragneiss in Danangou Area,Daqingshan-Wulashan Metamorphic Complex Belt(Acta Petrologica Sinica,ISSN1000-0569,CN11-1922/P,29(7),     

SERIALS

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GEOPHYSICAL EXPLORATION

正20142386An Guoying(China Aero Geophysical Survey and Remote Sensing Center for Land and Resources,Beijing 100083,China)Application of Satellite Remote Sensing in Regional Hydrogeological Investigation:Taking Cenozoic Strata in Wenquan Sheet(1∶250 000)of Karakoram Range as an Example(Geosci-     

QUATERNARY GEOLOGY & GEOMORPHOLOGY

正20141016An Chengbang(Key Laboratory of Western China’s Environmental Systems,Ministry of Education,Lanzhou University,Lanzhou 730000,China);Zhao Yongtao Lake Records during the Last Glacial Maximum from Xinjiang,NW China and Their Climatic Impli-     

PETROLEUM GEOLOGY

正20141538 Cao Qing(School of Earth Sciences and Engineering,Xi’an Petroleum University,Xi’an 710065,China);Zhao Jingzhou Characteristics and Significance of Fluid Inclusions from Majiagou Formation,Yichuan Huangling Area,Ordos Basin(Advances in Earth Science,ISSN1001-8166,CN62-1091/P,28(7),2013,p.819-828,7 illus.,3 tables,43 refs.)     

GEOCHEMISTRY

正20142002 Wei Hualing(Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang065000,China);Zhou Guohua Element Content and Mineral Compositions in Different Sizes of Soil in Tongling Area,Anhui Province(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(11),2013,p.1861