共查询到20条相似文献，搜索用时 250 毫秒
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为了解决屯留井田生产和生活用水,作者根据井田范围内煤田精查地质报告和潞安矿区供水水源勘探资料,结合区域及井田内水文地质构造条件,在井田内选定经济适用的供水水源地. 相似文献
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山西省属于地表水资源相对匮乏的地区,因此多选择地下水作为城市供水水源。进行水源地水文地质勘察工作时应根据不同含水岩组中地下水补给、径流、排泄条件,选定水源地位置和取水含水层,并对各含水层资源量以及可开采量进行计算,确定水源地可行性。文章以襄汾县夏梁水源地水文地质勘察为例就水源地水文地质勘察中含水层的选择及资源量的计算进行了讨论分析,以期为水源地水文地质勘察工作提供参考。 相似文献
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文章介绍了勘测定界的意义和工作任务,并按照工作流程依次说明了外业调查和外业测量的技术要点,最后简要地论述了勘测定界的工作成果。 相似文献
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针对山东省滕州市城市供水水源地——荆泉水源地及周围区域在2015年以来发生的多处岩溶塌陷情况,进行现场勘测,并就调查情况进行分析,总结了研究区的岩溶塌陷时空分布规律和形态特征等,该区岩溶塌陷主要发生在地势相对低洼,距河流较近的农田或村庄道路;发生时间一般是枯水期至丰水期之间和丰水期后的地下水位变化剧烈期。该区发生岩溶塌陷的主要原因是过量开采岩溶水,诱发因素有农田灌溉和降水,对该区域的岩溶塌陷灾害运用层次分析法进行易发性评价,并针对调查情况提出了控制规划地下水资源开采量,采取应急预防和监测预警措施的相应防治措施。 相似文献
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随着城市建设的飞速发展和社会市场的需求,土地勘测已成为土地征用、地籍管理、不动产登记发证等工作的一项重要工作环节。工作人员根据项目建设单位提供的规划意见图,利用国土资源数据中心下载的权属信息作为参考,实施调查和测绘,并对历史资料进行判断,完成整个土地勘界工作。二、勘测定界准备工作土地勘测定界工作是项目用地从立项到审批过程中的重要环节,是用地审批的重要依据。以建设用地勘测定界为例,建设项目用地勘测定界在整个用地审批过程中所处的位置如下。 相似文献
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通过对晋城崇实学校东华分校拟建场区采空区的勘测,详细介绍了综合工程物探的原理、工作方法及使用效果,证实了该方法的准确性与可靠性,建议在类似工程勘测中推广应用. 相似文献
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1956年5月,我由山东胶东老家,来到黑龙江省从事北大荒勘测工作。今年已是52周年,这篇文章,就是为了纪念当年所从事的土地勘测工作对国家所做的奉献。 相似文献
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征地勘测调查,顾名思义,应是为实施征地行为而进行的勘测调查.其成果就理所当然地要满足征地工作的需要,即满足编制征用土地、农用地转用、补充耕地、供地方案等征地报批材料的需要,满足征地方案批准后的批后实施的需要.但由于各种原因,在征地实践中征地勘测成果有时难以甚至不能满足征地工作的需要,造成浪费.因此,如何做好征地勘测调查工作成为值得探讨的话题. 相似文献
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本文在野外水文地质调查的基础上,通过概化河流水质模型、确定计算参数和采用有限差分法来离散水质模型的办法,用计算机模拟了不同排污状态、不同水文特征下该河系水中氟浓度的年份变化规律,从而为评价该河系水中氟污染程度提供了定量依据。 相似文献
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通过对石柱子花岗闪长岩体重砂爆裂法研究，发现其轻组分爆裂频次（或活度）有明显差异．并确定区内重砂轻组分爆裂颇次异常下限值为４２００次，据此确定了８个重砂爆裂活度异常区，圈定并缩小了找矿靶区。同时重砂爆裂普查法还可以反映出岩体成矿的可能性，判别岩体的矿化程度．研究表明，重砂爆裂普查法对于发现热液盲矿体具有可行性，可为普查找矿提供信息． 相似文献
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辽宁省重工业基础雄厚，地下水开发利用程度高，致使区域水文地质条件发生变化，由此诱发了一系列的环境水文地质问题。本文分析了辽宁地下水特征，概括归纳可能产生的该省特有的环境水文地质问题。 相似文献
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Simulating the effect of hydrate dissociation on wellhead stability during oil and gas development in deepwater 总被引：1，自引：0，他引：1
It is well known that methane hydrate has been identified as an alternative resource due to its massive reserves and clean property. However, hydrate dissociation during oil and gas development (OGD) process in deep water can affect the stability of subsea equipment and formation. Currently, there is a serious lack of studies over quantitative assessment on the effects of hydrate dissociation on wellhead stability. In order to solve this problem, ABAQUS finite element software was used to develop a model and to evaluate the behavior of wellhead caused by hydrate dissociation. The factors that affect the wellhead stability include dissociation range, depth of hydrate formation and mechanical properties of dissociated hydrate region. Based on these, series of simulations were carried out to determine the wellhead displacement. The results revealed that, continuous dissociation of hydrate in homogeneous and isotropic formations can causes the non-linear increment in vertical displacement of wellhead. The displacement of wellhead showed good agreement with the settlement of overlying formations under the same conditions. In addition, the shallower and thicker hydrate formation can aggravate the influence of hydrate dissociation on the wellhead stability. Further, it was observed that with the declining elastic modulus and Poisson’s ratio, the wellhead displacement increases. Hence, these findings not only confirm the effect of hydrate dissociation on the wellhead stability, but also lend support to the actions, such as cooling the drilling fluid, which can reduce the hydrate dissociation range and further make deepwater operations safer and more efficient. 相似文献
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利用尼泊尔地区GPS时间序列季节性信号,构建区域季节性三维位移场和应力应变场模型,再结合降水和地震目录等数据,研究该地区季节性水文负荷对地震活动性的调制作用。结果表明：1）季节性地表位移与降水存在较强的时空相关性;2）季风期的降水对断层的长期运动趋势产生扰动,使库仑应力得到一定程度的释放,进而对地震活动产生抑制作用,并影响地震发生时间。 相似文献
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The effects of using different types of glass fiber filters (GF/F, GF/C) and of sample treatments evaluated. Studies on the variation of suspended matter (SM) and particulate organic carbon (POC) showed that: 1) the transversal and day to night variations are important and must be taken into account in order to get a corrcet river flux; 2) no regular seasonal variations of SM and POC observed, as they are controlled essentially by the climatological, hydrologic, physiochernical, biological, and geological conditions of the drainage area. 相似文献
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该文通过回顾近十几年来河南省大中型火电厂地下水资源勘查概况,分析水源地运行情况,指出可持续开发与利用的条件,扩大开采量的可能性,及可以采取的相应措施。 相似文献
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本文介绍万分之一正射影像图的技术要求和制作方法，利用正射影像图在山区布设物化探测网的生产过程，与传统的测网布设方法相比，具有节省开支、降低消耗、减轻劳动强度、提高效率、精度均匀可靠等优点，完全能够满足普查阶段地质找矿的需要。 相似文献
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The most promising approach for studying soil moisture is the assimilation of observation data and computational modeling.However,there is much uncertainty in the assimilation process,which affects the assimilation results.This research developed a one-dimensional soil moisture assimilation scheme based on the Ensemble Kalman Filter(EnKF)and Genetic Algorithm(GA).A two-dimensional hydrologic model-Distributed Hydrology-Soil-Vegetation Model(DHSVM)was coupled with a semi-empirical backscattering model(Oh).The Advanced Synthetic Apertture Radar(ASAR)data were assimilated with this coupled model and the field observation data were used to validate this scheme in the soil moisture assimilation experiment.In order to improve the assimilation results,a cost function was set up based on the distance between the simulated backscattering coefficient from the coupled model and the observed backscattering coefficient from ASAR.The EnKF and GA were used to re-initialize and re-parameterize the simulation process,respectively.The assimilation results were compared with the free-run simulations from hydrologic model and the field observation data.The results obtained indicate that this assimilation scheme is practical and it can improve the accuracy of soil moisture estimation significantly. 相似文献
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I.IN~crIOXLocatedinthecoddlepatofTallmBasin,withanareaof33.76X104klnZ,theTaldirnakan~isinthehinterlandofEurasia.Blockedbythehighmountainsaround,vapourofoceancanhardlyreachthedesert.APartfromthis,asthedeSertisinthesinkingcompensationareaoftheascensionalaircurrentaamstheQinghal-XIZangPlateau,itSprecipitationisrareandtheevaporationcapacityisintensealltheyearround.Allthesecontributetotheformationsofthetypifydrydesertclimate.Theacidityindexofthedesertandthearoundregionisashighasmorethan50,w… 相似文献