水灾遥感实时监测与快速评估的实践与思考   总被引：2，自引：0，他引：2  

戴昌达  唐伶俐 《地球科学进展》1996,11(5):498-503

总结了参加１９９１￣１９９５年间３次水灾遥感监测与评估科学实验所取得的结果，并结合国情分析，提出进一步发挥航天遥感作用，航天与航空相结合，建立一个花费较少，切实可行，能满足水灾实时监测与快速评估需要的设想。  相似文献   

The Uplift of the Longmenshan Thrust Belt and Subsidence of the West Sichuan Foreland Basin   总被引：8，自引：0，他引：8  

Liu Shugen  Luo Zhili  Dai Sulan  Changlu Institute of Technology  Chengdu  Sichuan  ChinaDennis Arne Dalhousie U niversity  Canadaand C.J.L. Wilson Melbourne U niversity  Australia Jiang M inxi 《《地质学报》英文版》1996,70(1):16-26

Based on fission track dating of apatite, and measurement of vitrinite reflectance of rock samples from the Longmenshan (Longmen Mountain)area and the West Sichuan foreland basin and computer modelling it is concluded that (l)the Songpan-Garze fold belt has uplifted at least by 3-4 km with an uplift rate of no less than 0.3-0.4 mm/a since 10 Ma B.P.; (2) the Longmenshan thrust nappe belt has uplifted at least by 5-6 km with an uplift rate of more than 0.5- 0.6 mm /a since 10 Ma B.P.; (3) the Longmenshan detachment belt has uplifted by 1 - 2 km at a rate of 0.016-0.032 mm/a since 60 Ma B.P.; (4) the West Sichuan foreland basin has uplifted by 1.7-3 km at a rate of 0.028-0.05 mm/a since 60 Ma B.P.; (5) the uplift rate of the area on the west side of the Beichuan-Yingxiu-Xiaoguanzi fault for the last 10 Ma is 40 times as much as that on its east side; (6) the uplifting of the the Songpan - Garze fold belt and the subsidence of the West Sichuan foreland basin 60 Ma ago exhibit a mirro-image correlation, i.e  相似文献   

二维地电条件下充电法地形改正的一种方法   总被引：2，自引：0，他引：2  

戴光明  罗延钟 《物探化探计算技术》1997,19(1):36-40

本文首先讨论了充电法地形改正方法及存在的问题，提出了一种基于比值法思想的地改方法，经理论模型验算表明，有较好的地改效果  相似文献   

Main models and distribution patterns of gas reservoirs in large-medium gas fields of China     

Yan Song  Jinxing Dai  Chunsen Dai  Ying Chen  Feng Hong 《中国科学D辑(英文版)》1997,40(1):23-31

Based on characteristics and trap types of gas reservoirs in large and medium gas fields in China, 4 gas reservoir models have been established:(i) structural trap gas reservoir model I, formed earlier than or simutaneously with generating of gases; (ii) structural trap gas reservoir model II, formed later than generating of gases; (iii) fossil weathered residuum gas reservoir model; and (iV) mud diapir abnormal temperature and pressure gas reservoir model. Distribution patterns of large-medium gas fields are described with the concept of “sealed compartment”. It is concluded that the inner-compartment area, marginal area of the compartment and the areas between two overlapped sealed compartments are the most favourable areas for discovering large-medium gas fields. Project supported by the “85–102” Chinese National Key Science and Technology Project.  相似文献   

The Point Eidothermometric Method in the Study of Coastal Aquifers     

Giuseppe C. Calò  Roccaldo Tinelli 《Ground water》1997,35(1):47-52

  相似文献   

华宁盘溪金山-大石山泥盆纪珊瑚礁的基本特征     

洪天求  戴清明 《吉林大学学报(地球科学版)》1997,(1)

滇东华宁盘溪火车站以北的金山—大石山地区发育中、晚泥盆世的丘状珊瑚礁。以Ａｌｖｅｏｌｉｔｅｓ和Ｔｈａｍｎｏｐｏｒａ为代表的床板珊瑚为造礁生物。纵剖面上岩相变化的记录清楚地表明，该礁体经历了定殖、繁殖和衰亡三个阶段。海水变浅及其盐化是导致礁体衰亡的直接原因  相似文献   

The ACPI Climate Change Simulations     

Aiguo Dai  W. M. Washington  G. A. Meehl  T. W. Bettge  W. G. Strand 《Climatic change》2004,62(1-3):29-43

The Parallel Climate Model (PCM) has been used in the Accelerated ClimatePrediction Initiative (ACPI) Program to simulate the global climateresponse to projected CO₂, sulfate, and other greenhouse gasforcingunder a business-as-usual emissions scenario during the 21st century. In these runs, the oceans were initialized to 1995 conditions by a group from the Scripps Institution of Oceanography and other institutions. An ensemble of three model runs was then carried out to the year 2099 using the projected forcing. Atmospheric data fromthese runs were saved at 6-hourly intervals (hourly for certain criticalfields) to support the ACPI objective of accurately modeling hydrologicalcycles over the western U.S. It is shown that the initialization to1995 conditions partly removes the un-forced oceanic temperature and salinity drifts that occurred in the standard 20th century integration. The ACPI runs show a global surface temperature increase of 3–8 °C over northern high-latitudes by the end of the 21st century, and 1–2 °C over the oceans. This is generally within ±0.1°Cof model runs without the 1995 ocean initialization. The exception is in theAntarctic circumpolar ocean where surface air temperature is cooler in theACPI run; however the ensemble scatter is large in this region. Althoughthe difference in climate at the end of the 21st century is minimalbetween the ACPI runs and traditionally spun up runs, it might be largerfor CGCMs with higher climate sensitivity or larger ocean drifts. Ourresults suggest that the effect of small errors in the oceans (such asthose associated with climate drifts) on CGCM-simulated climate changesfor the next 50–100 years may be negligible.  相似文献   

The first absolute gravity measurements in Indonesia     

Yoichi Fukuda  Toshihiro Higashi  Shuzo Takemoto  Maiko Abe  Sjafra Dwipa  Dendi Surya Kusuma  Achmad Andan  Koichiro Doi  Yuichi Imanishi  Giuseppe Arduino 《Journal of Geodynamics》2004,38(3-5):489

For the purposes of the calibration of the superconducting gravimeter (SG) in Bandung and the establishment of the absolute gravity (AG) points, we carried out AG measurements for the first time in Indonesia in November 2002. The measurements in Bandung were conducted between November 15th and 20th by means of a FG5 (#210), and 14,520 effective drops were obtained. The gravity value newly determined at the AG point in Bandung is 977976701.2 μgal (1 μgal = 10⁻⁸ ms⁻²) and the scale factor for the SG is −52.22 μgal/V. We also established another AG point in Yogyakarta near Merapi volcano and carried out AG measurements in Yogyakarta between November 22nd and 26th. The gravity value determined for this station is 978203093.5 μgal.  相似文献   

临汾"8.26"区域性大暴雨过程分析   总被引：2，自引：0，他引：2       下载免费PDF全文

张临平  王智娟  史海平  戴有学  孙悦 《山西气象》2004,(4):5-6,10

利用micaps业务平台常规资料、数值预报产品、卫星云图，对临汾市2003年8月26日区域性暴雨和大暴雨的环流背景、影响系统、热带低压登陆副热带高压东退以及物理量条件进行了诊断分析，探讨了副热带高压进退及台风登陆位置在这次大暴雨过程中起到了非常重要的作用。分析结果在暴雨预报业务及暴雨研究中有一定的指示意义。  相似文献   

Large boulder accumulations by extreme waves along the Adriatic coast of southern Apulia (Italy)     

Giuseppe Mastronuzzi  Paolo Sans 《Quaternary International》2004,120(1):173

The Adriatic coast of southern Apulia (Italy) is marked by the presence of large boulder accumulations. Boulders are up to 8 t in weight and arranged either in small groups or rows composed of a few imbricated elements. The lower surface of some of the boulders is covered by biogenic encrustation which suggests that they were possibly carved from the mid or sublittoral zone and that they capsized during their transport. Other boulders, detached from the supratidal zone, have their surface affected by tilted rock pools. New horizontal solution pans are continually forming.A detailed survey of a large boulder accumulation was carried out at Torre Santa Sabina. Direct observations were also made concerning the carving out and transportation of one single boulder during the severe storms in that area on January 4th, 2002 and on January 12th, 2003. Collated data from both the survey and the direct observations including some radiocarbon age determinations and hydrodynamic calculations suggest that the studied accumulation was due to the superimposed effects of one or two tsunami as well as of storm waves. Tsunami would be responsible for the detachment and transportation of the largest boulders, while storm waves may have been responsible for the carving out and transportation of the newer, smaller blocks and for moving once again the largest boulders. It was in this way that a typical boulder accumulation was produced.The collated data suggest that two tsunami may have recently struck the Adriatic coast of southern Apulia. The first possibly took place on the Dalmatian coast as a result of the earthquake on April 6, 1667 which destroyed Ragusa (modern day Dubrovnik). The second tsunami would have accompanied the strong earthquake which took place in southern Apulia on February 20, 1743.  相似文献