Probabilistic reservoir operation using Bayesian stochastic model and support vector machine   总被引：3，自引：0，他引：3  

Mohammad Karamouz  Azadeh Ahmadi  Ali Moridi   《Advances in water resources》2009,32(11):1588-1600

Available water resources are often not sufficient or too polluted to satisfy the needs of all water users. Therefore, allocating water to meet water demands with better quality is a major challenge in reservoir operation. In this paper, a methodology to develop operating strategies for water release from a reservoir with acceptable quality and quantity is presented. The proposed model includes a genetic algorithm (GA)-based optimization model linked with a reservoir water quality simulation model. The objective function of the optimization model is based on the Nash bargaining theory to maximize the reliability of supplying the downstream demands with acceptable quality, maintaining a high reservoir storage level, and preventing quality degradation of the reservoir. In order to reduce the run time of the GA-based optimization model, the main optimization model is divided into a stochastic and a deterministic optimization model for reservoir operation considering water quality issues.The operating policies resulted from the reservoir operation model with the water quantity objective are used to determine the released water ranges (permissible lower and upper bounds of release policies) during the planning horizon. Then, certain values of release and the optimal releases from each reservoir outlet are determined utilizing the optimization model with water quality objectives. The support vector machine (SVM) model is used to generate the operating rules for the selective withdrawal from the reservoir for real-time operation. The results show that the SVM model can be effectively used in determining water release from the reservoir. Finally, the copula function was used to estimate the joint probability of supplying the water demand with desirable quality as an evaluation index of the system reliability. The proposed method was applied to the Satarkhan reservoir in the north-western part of Iran. The results of the proposed models are compared with the alternative models. The results show that the proposed models could be used as effective tools in reservoir operation.  相似文献   

Optimization of the Sefid-Roud Dam desiltation process using a sophisticated one-dimensional numerical model   总被引：1，自引：0，他引：1  

Ali KHOSRONEJAD 《国际泥沙研究》2009,24(2):189-200

Although water and soil conservation activities reduce reservoir sedimentation, it is inevitable that reservoirs fed by rivers transporting high amounts of sediment will experience sedimentation. The Ghezel-Ozan and Shah-Roud rivers, which flow to the Sefld-Roud reservoir dam, are both highly sediment-laden and transport significant amounts of sediment in both bed load and suspended load forms to the reservoir. Hence, it seems that the only practical way to remove the sediment from the reservoir is to flush it out using the Chasse method. In the present paper, field measurements of Chasse operation characteristics taken in previous years are presented, and a numerical model that simulates this process is introduced. After calibrating the model using field measured data, the calculated results （for reservoir pressure flushing and released sediment volume） of the numerical model were compared with other measured data for the same Chasse operation and the results agree well. Finally, using the numerical simulation results, the best approaches to ensure highly effective flushing while conserving reservoir water are presented （at least for the Sefid-Roud dam）. The operation of the bottom outlet gates, the shape of the output hydrograph, and the reservoir water level variation during flushing were optimized. In addition, the numerical model and related parameters, which need to be calibrated, are discussed.  相似文献   

四川前兆钻孔应变仪台站观测系统运行管理现状分析     

董雪梅  徐建明  张晋川  陈学芬  阳光  赵明渊  黄静 《四川地震》2009,(4):31-36

四川数字地震观测网络项目前兆分项目建设已通过中国地震局监测司的验收,四川前兆钻孔应变仪台站观测系统已运行一年多,从观测工作的各个环节都有值得总结和分析的必要,从而更好地服务于地震预报和科学研究。  相似文献   

机房动力环境监控系统     

兰陵  宋立军  周文 《内陆地震》2009,23(2):251-257

通过解决新疆维吾尔自治区地震局应急指挥中心和信息网络机房动力环境设备的控制与管理中遇到的实际问题,介绍了机房动力环境监控系统在网络机房中的应用.  相似文献   

三维地质建模技术方法研究——以东昆仑造山带为例     

张思科  倪晋宇  高万里  胡道功 《地质力学学报》2009,15(2):201-208

三维地质建模的关键技术, 是如何利用专业地理信息系统(GIS)的立体空间平台将三维空间地质实体真实地再现, 实现地质体的三维可视化和相关空间分析, 为地质研究和矿产资源勘查提供技术支撑。本文以东昆仑造山带为研究对象, 利用Micromine软件系统对地质体三维实体建模中的关键技术和建模方法进行了探索性研究, 初步总结出三维地质建模的主要技术和方法流程。   相似文献   

辽宁小夹皮沟硼矿床地质特征及老矿区找矿方法探讨     

曹俊义  廉涛  王成波  刘亚君  李大力  王长波  徐敏成 《地质与资源》2009,18(2):129-133

基于对小夹皮沟硼矿床的岩石化学、地质构造、岩浆岩特征及地面磁异常、水系沉积物异常特征的分析研究,对小夹皮沟硼矿床与找矿（扩大储量）有密切相关的主要地质特征进行了详细论述.探讨了老矿区找矿方法,总结出老矿区找矿的化探定向-物探定位-地质定性-工程定量的找矿方法（程序）.  相似文献   

基于简单要素模型的多边形分割算法     

田光  谢忠  吴亮 《地理与地理信息科学》2010,26(1)

多边形是GIS研究和应用中使用最频繁的几何对象,该文描述了基于简单要素模型的任意多边形分割算法。从计算几何出发,结合GIS空间数据的特点,将基于简单要素模型的多边形分割算法设计为:1)对多边形及分割线的边界排序,基于扫描线及外包矩形检测查找可能相交的线段,提高相交线段的搜索效率;2)计算交点生成结点信息(包括交点坐标、线号及交点的出入),并存储在独立的单向链表中;3)根据结点链表和原多边形坐标搜索结果多边形。该算法能够分割任意简单多边形(凹凸、曲线边界和带洞的多边形)以及有共享边的多边形。最后在MapGIS7.0平台上,实现了基于简单要素类的多边形分割功能。  相似文献   

马氏珠母贝育珠细胞小片和珠核处理技术研究Ⅲ:插核手术贝伤口区弧菌类型的初步研究     

温崇庆  陈燕玲  王梅芳  余祥勇 《广东海洋大学学报》2010,30(6)

从马氏珠母贝(Pinctada martensii)插核部位蘸取组织液分离弧菌,研究插核手术前后室内休养3 d时伤口部位弧菌类型的变化,比较使用不同小片和珠核处理液对手术伤口部位弧菌类型的影响。形态和生理生化特征分型和鉴定结果显示,插核前和休养期贝样上分离的优势弧菌类型无明显差异,只是休养期弧菌的分离频率有所下降;从术后不同处理组的马氏珠母贝伤口上均分离得到7个类型弧菌,弧菌所属的种类也一致,而从未插核的对照组相应部位上只分离到4个类型弧菌,除未分离到副溶血弧菌(Vibrio parahaemolyticus)外,对照组与两个处理组贝样上分离到的弧菌种类基本上一致。  相似文献   

数字化城市管理一体化数据建设研究——以郑州市为例   总被引：1，自引：0，他引：1  

杨瑞霞  王韩波  张莉 《地球信息科学学报》2010,12(2):214-219

依据数字化城市管理对数据建设的要求,以及郑州市基础地理数据及城市管理数据现状情况,结合郑州市国土、规划等部门对基础地理空间数据的需求,本文提出了数字化城市管理数据建设一体化作业流程,将1∶500航测地形图、1∶1 000正射影像制作、城市部件测量、地理编码调查、以及数据综合建库等内容,按照其关联性进行流程设计和一体化实施。它充分利用了数字化航测成图、城市部件采集与建库、地理编码采集与建库在作业工序上的交互性,为较短时间内完成大范围城市基础地理空间数据、城市管理专题数据采集与建库提供了保证,满足了数字化城市管理、城市地籍测量等对基础空间数据的迫切需求。实践证明,一体化数据建设方案充分反映了数据之间的逻辑关系和共享可能性,既加快了数据建设进程、拓展了数据建设内容,同时又保证了数据建设质量,是一种可供借鉴应用的数据建设方式。  相似文献   

滇东南岩溶区找水打井经验——以云南省广南县珠琳地区为例     

张贵  周翠琼  王波  顾维芳  戴文敏  张文鋆 《中国岩溶》2017,36(5):626-632

以1996-2012年期间抗旱打井实例,总结了找水技术方法、勘查工作流程,提出了滇东南高原斜坡地带岩溶区找水要点:分水岭弱径流带,主要目标是在古溶蚀台面上接近区域分水岭的地段、规模较大的溶蚀洼地中的扬起端寻找浅层岩溶水;缓坡区较强径流带,主要目标是寻找面积较大、产状较平缓的悬托弱透水层之上的滞水型岩溶水;斜坡区强径流带,主要应寻找暗河天窗、竖井中的岩溶水。确定井位应遵循区域调查分析+井位附近详细调查分析的工作程序,必要时配合开展物探准确定位;不宜在排泄区、强径流区、峰丛洼地区、大泉、地下河附近、负地形最低部位布井,物探成果应用须与水文地质调查成果紧密结合。   相似文献