一种新的水面蒸发计算方法   总被引：2，自引：0，他引：2  

洪嘉琏  傅国斌 《地理研究》1993,12(2):55-62

本文应用相似理论,提出一个考虑自由对流和强迫对流相结合的水面蒸发模式,并用实测资料对蒸发模式作了检验。  相似文献   

泥浆体流变试验的比测     

泥浆体流变比测组 《山地学报》1993,(2)

这次泥浆体流变试验的比测使用了五种不同规格的旋转式粘度计,并把其测试结果与毛管式粘度计的测试结果作了对比。对比结果表明:若用旋转式粘度计测试具有非牛顿体特性的泥浆体,应尽可能采用具有转筒半径比(α=外筒半径R_c/内筒半径R_b)较小的测试室;若是用具有α>1.05的测试室测试,所得的数据则应作特殊处理。毛管式、旋转式两种粘度计的测试结果基本一致,并具相仿的精度。测试结果的离散程度超过仪器的测试误差。这有待进一步研究、查明原因。  相似文献   

A PRELIMINARY ANALYSIS ON THE CHARACTERISTICS OF THE KUROSHIO FRONTAL EDDY IN THE EAST CHINA SEA IN SPRING   总被引：3，自引：0，他引：3  

郑义芳  黄卫民  Nakamura Yasuaki 《中国海洋湖沼学报》1993,11(3):276-284

The Kuroshi'o front eddy's surface and sectional isothermal distribution characteristics were analyzed on the basis of observation data obtained in April 13-16 of 1989 in the East China Sea. It was found from the similarity between these isothermal distributions with those in January and beginning of June for the years 1986-1990 that the Kuroshio front eddy often occurred from March to the beginning of June. The Kuroshio front eddy movement in the East China Sea in spring was along two routes: the Okinawa Trough route, and the continental shelf slope route. The two moving routes both in the surface layer and in the section are described, their causes are discussed, and differences are compared.  相似文献   

Intercomparison of stratospheric water vapor profiles obtained during the Balloon Intercomparison Campaign     

D. Murcray  A. Goldman  J. Kosters  R. Zander  W. Evans  N. Louisnard  C. Alamichel  M. Bangham  S. Pollitt  B. Carli  B. Dinelli  S. Piccioli  A. Volboni  W. Traub  K. Chance 《Journal of Atmospheric Chemistry》1990,10(2):159-179

The Balloon Intercomparison Campaign (BIC) was set up to intercompare remote sensing measurements of a number of compounds other than water vapor; however, water vapor has strong absorption features throughout the infrared and mm wave regions of the spectrum. Therefore many of the investigators involved in BIC have absorption or emission features due to water vapor in the data they obtained during the balloon flights made under the campaign. These features have been used by the investigators to determine the stratospheric water vapor profiles which are compared in this paper. The profiles allow comparison of a wide range of remote sensing techniques involving both emission and absorption in the mid-infrared and emission techniques in the far infrared.  相似文献   

One-dimensional, steady vertical flow in a layered soil profile     

A. W. Warrick  T. -C. Jim Yeh 《Advances in water resources》1990,13(4)

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漳州热田地下热水的循环深度   总被引：1，自引：0，他引：1       下载免费PDF全文

熊亮萍  汪集yang 《地质科学》1990,(4):377-384

漳州热田是我国东南沿海地区目前所见温度(121.5℃)最高的一个。热田地热地质、地球化学以及地温场的研究结果表明,漳州热田属于深循环对流型热田。为了计算热田的热水循环深度,本文采用管道模型的方法,利用热田中心钻孔的测温资料计算地下热水上涌的流速,利用热田内水化学资料计算热储温度,然后用图解法求出漳州热田热水的循环深度为3.4—4.0 km,为漳州热田的成因分析和热水资源的评价提供了依据。  相似文献   

小型水工建筑物的组合式消能工在季节冻土区的应用     

王世荣  赵贵山 《冰川冻土》1990,12(1):83-86

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Assessment of reliability in water distribution networks using entropy based measures   总被引：2，自引：0，他引：2  

K. Awumah  I. Goulter  S. K. Bhatt 《Stochastic Environmental Research and Risk Assessment (SERRA)》1990,4(4):309-320

Entropy based expressions for measurement of reliability and redundancy have recently been reported. These measures approach assessment of the reliability of the distribution network from the intrinsic redundancy of the network layout. The paper extends earlier work on entropy functions by including a more explicit statement of the alternate paths available in the network and by recognizing that under certain circumstances, e.g., failure of some part of the network work, an outflow link from a node under normal working condition may become an inflow link to the same node. The measures are assessed by comparison with parameters measuring Nodal Pair Reliability and percentage of flow supplied at adequate pressure for a range of networks and link failure conditions in this networks. The entropy measures are shown to reflect changes in the network reliability, as measured by these two comparative parameters, very well.  相似文献   

桂阳宝山西矿群孔抽水试验曲线分析   总被引：1，自引：0，他引：1  

左平怡 《湖南地质》1990,(4)

桂阳宝山矿区主要含水层壶天群及梓门桥组白云岩,与桂阳县城联成一坎,据水文地质特征,矿区至县城可划分为3个水文地质单元,在矿区西矿段距县城1.1km以上的K23孔连续抽水55天,抽取水最21.1万吨,主孔水位自322.95m降至267.45m,主孔周围有29个观测孔,控制面积4.6km~2,圈定的降落漏斗为椭圆形,面积0.5km~2。通过对各种试验数据与曲线分析说明试验区含水体主要补给源为降雨渗入,在西矿水位降至267m时,与县城之间无水力联系。  相似文献   

丰城—乐平硅质岩带放射性水异常的同位素特征     

邵飞 《华东地质学院学报》1991,14(1):66-74

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