河南省旅游观光业发展战略构想   总被引：2，自引：0，他引：2  

王庆生  陈家振 《地域研究与开发》1994,13(3):47-50

河南省历史悠久，文物古迹丰富，旅游发展前景广阔，目前已进入重要阶段。但由于旅游景点集中连片差，轰动效应差，使河南旅游业在全国一直处于旅游热线上的“温点”。本文试图为改善河南旅游业的运行机制，提供基本的战略思路。  相似文献   

海湾地区移民潮及其受最近海湾战争的影响     

Meyer  G 王庆生 《地理译报》1994,13(2):58-63

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Application of a Bayesian approach to stochastic delineation of capture zones   总被引：1，自引：0，他引：1  

Feyen L  Dessalegn AM  De Smedt F  Gebremeskel S  Batelaan O 《Ground water》2004,42(4):542-551

This paper presents a Bayesian Monte Carlo method for evaluating the uncertainty in the delineation of well capture zones and its application to a wellfield in a heterogeneous, multiaquifer system. In the method presented, Bayes' rule is used to update prior distributions for the unknown parameters of the stochastic model for the hydraulic conductivity, and to calculate probability-based weights for parameter realizations using head residuals. These weights are then assigned to the corresponding capture zones obtained using forward particle tracking. Statistical analysis of the set of weighted protection zones results in a probability distribution for the capture zones. The suitability of the Bayesian stochastic method for a multilayered system is investigated, using the wellfield Het Rot at Nieuwrode, Belgium, located in a three-layered aquifer system, as an example. The hydraulic conductivity of the production aquifer is modeled as a spatially correlated random function with uncertain parameters. The aquitard and overlying unconfined aquifer are assigned random, homogeneous conductivities. The stochastic results are compared with deterministic capture zones obtained with a calibrated model for the area. The predictions of the stochastic approach are more conservative and indicate that parameter uncertainty should be taken into account in the delineation of well capture zones.  相似文献   

Generating MODFLOW grids from boundary representation solid models   总被引：3，自引：0，他引：3  

Jones NL  Budge TJ  Lemon AM  Zundel AK 《Ground water》2002,40(2):194-200

Complex stratigraphy can be difficult to simulate in MODFLOW models. MODFLOW uses a structured grid that requires that each grid layer be continuous throughout the model domain. This makes it difficult to explicitly represent common features such as pinchouts and embedded seams in a MODFLOW model. In this paper, we describe a method for automatically generating MODFLOW-compatible grids from boundary-representation solid models. Solid models are data structures developed originally for computer-aided design applications that define the geometry of three-dimensional objects. Solid models can be used to represent arbitrarily complex stratigraphy. The elevations defined by the solids are then extracted from the solids in a manner that preserves the continuous-layer requirement imposed by MODFLOW. Two basic approaches are described: The first method adjusts the MODFLOW grid dimensions (layer elevations) to fit the solid model boundaries, and the second method creates a regular MODFLOW grid and adjusts the material properties to match the changes in stratigraphy. One of the main benefits of using solid models to define stratigraphy for MODFLOW models is that it provides a grid-independent definition of the layer elevations that can be used to immediately re-create the MODFLOW grid geometry after any change to the grid resolution.  相似文献   

人口地理学进展     

芬得.  AM 王庆生 《地理译报》1995,14(1):44-47

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黔北地区硫铁矿资源分析     

王庆生  陈昌守 《贵州地质》1989,6(4):363-372

本文针对广布于黔北、特别是川黔铁路沿线的硫铁矿资源,从矿床地质特征、不同类型矿石的选别指标及部份重点矿床的有关情况等方面进行了阐述,通过具体分析,对黔北地区目前可选作矿山基地的矿床之理由、不同类型矿石的开发利用前景及今后开发硫铁矿需注意的事项,均作了较详细的论述。  相似文献   

栾川县自然资源综合开发利用研究     

王庆生 《地域研究与开发》1989,(Z1)

栾川县位于豫西深山区,伊河上游。全县土地面积2477.3平方公里,耕地19.6万亩。1986年总人口26.44万人,农业人口占96％。全县地势东北低西南高,海拔450米到2000米以上,最高峰鸡角尖2212.5米。县内林、牧和土特产资源丰富,矿产资源多样。但如何综合开发利用这些资源,是县城经济振兴中一个急待研究的问题。 一、自然资源的特点 1、以林牧为主的土地利用结构。熊耳山横贯栾川境的中北部,南面是伏牛山。地貌以中低山为主,海拔450米到1000米的中切割低山占总面积的50.6％,  相似文献   

苏联早前寒武纪地层对比及划分原则和方法     

A.  AM 《国外前寒武纪地质》1991,(4):88-89

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Testing the applicability of a Marine Biotic Index (AMBI) to assessing the ecological quality of soft-bottom benthic communities, in the South America Atlantic region   总被引：2，自引：0，他引：2  

Muniz P  Venturini N  Pires-Vanin AM  Tommasi LR  Borja A 《Marine pollution bulletin》2005,50(6):624-637

Recently, several monitoring programmes have been undertaken to evaluate the impact of different anthropogenic activities, upon a range of coastal ecosystems located in the South-western Atlantic. In the present contribution, the applicability of the AZTI's Marine Biotic Index (AMBI) is tested, to establish the benthic health of the ecosystem using these data sets. As the AMBI was created previously for use in European estuarine and coastal environments, its general applicability to new geographical locations is discussed. In general, the results are in agreement with those obtained using traditional univariate and multivariate methods. Some inconsistent results are observed, when low abundances and/or number of taxa are recorded in the samples. Moreover, when the macrofauna samples are dominated by large nematodes, the classification of the benthic ecosystem health using AMBI is not consistent with previous results achieved applying other statistical techniques. Thus, parallel to the application of this index to a wider extend, the complementary use of different indices and/or methods is recommended to assess confidently the environmental quality of a coastal area.  相似文献   

PCDD and PCDF intake through consumption of locally produced seafood by Venice lagoon residents: elements for risk management     

Miniero R  Ceretti G  Cherin E  Dellatte E  De Luca S  Ferri F  Fulgenzi AR  Grim F  Iacovella N  Iamiceli AL  Ingelido AM  Vio P  di Domenico A 《Marine pollution bulletin》2005,50(12):1727-1732

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