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基于GRNN模型的区域水资源可持续利用评价
水资源可持续利用 指标体系 广义回归神经网络（GRNN） 层次分析法 文山州 云南
2012/3/31
利用层次分析法构建了符合丰水地区水资源可持续利用指标体系和评价标准，从水资源条件、水资源开发利用效率、生态环境状况、水资源合理配置和水资源管理能力5个方面提出50个评价指标，并运用GRNN神经网络水资源可持续利用评价模型，对文山州不同规划水平年水资源可持续利用进行了综合评价。结果表明：① 不同规划水平年各评价区域水资源可持续利用评价为2~3级，反映出文山州现状及中、长期水资源处于可持续与基本可持续...
Modelling Snow Water Conservation on the Canadian Prairies
Modelling Snow Water Conservation the Canadian Prairies
2014/4/2
Snowcover accumulation has tremendous impacts on Canadian Prairie hydrology and agriculture (Pomeroy and Gray, 1995; Fang and Pomeroy, 2007). Wind redistribution of snow or blowing snow is frequent in...
Generalized versus non-generalized neural network model for multi-lead inflow forecasting at Aswan High Dam
non-generalized neural network model multi-lead inflow
2011/3/15
Artificial neural networks (ANN) have been found efficient, particularly in problems where characteristics of the processes are stochastic and difficult to describe using explicit mathematical models....
Seasonal prediction of winter extreme precipitation over Canada by support vector regression
winter extreme precipitation Canada support vector regression
2011/1/7
For forecasting the maximum 5-day accumulated precipitation over the winter season at lead times of 3, 6, 9 and 12 months over Canada from 1950 to 2007, two nonlinear and two linear regression models ...
A stochastic design rainfall generator based on copulas and mass curves
rainfall generator copulas mass curves
2010/12/22
The use of design storms can be very useful in many hydrological and hydraulic practices. In this study, the concept of a copula-based secondary return period in combination with the concept of mass c...
An inversion method based on multi-angular approaches for estimating bare soil surface parameters from RADARSAT-1
multi-angular approaches estimating bare soil surface parameters
2010/12/22
This paper focuses on inversion of these parameters using a multi-angular approach based on RADARSAT-1 data with incidence angles of 35° and 47° (in mode S3 and S7). This inversion was performed with ...
An assessment of future extreme precipitation in western Norway using a linear model
extreme precipitation western Norway linear model
2010/12/22
A Linear Model (Smith and Barstad, 2004) was used to dynamically downscale Orographic Precipitation over western Norway from twelve General Circulation Model simulations. The GCM simulations come from...
Spatial uncertainty assessment in modelling reference evapotranspiration at regional scale
evapotranspiration regional scale
2010/12/22
Evapotranspiration is one of the major components of the water balance and has been identified as a key factor in hydrological modelling. For this reason, several methods have been developed to calcul...
Understanding and managing the Westerschelde – synchronizing the physical system and the management system of a complex estuary
Westerschelde – synchronizing physical system management system
2010/12/22
This article analyzes the relationship between the processes of policy making, management and research and the way in which the Westerschelde estuary developed between 1985 and 2006. The Westerschelde...
Flood frequency analysis (FFA) entails the estimation of the upper tail of a probability density function (PDF) of annual peak flows obtained from either the annual maximum series or partial duration ...
Polymer tensiometers with ceramic cones: direct observations of matric pressures in drying soils
Polymer tensiometers ceramic cones drying soils
2010/12/22
Measuring soil water potentials is crucial to characterize vadose zone processes. Conventional tensiometers only measure until approximately −0.09 MPa, and indirect methods may suffer from the n...
利用2006年Argo浮标资料分析吕宋海峡以东海域水团季节特性和混合层的月平均变化规律; 并分别利用Argo多年季节平均资料与2006年资料, 以秋季为例, 基于P矢量方法计算该区域流场; 同时考虑风生流的影响, 将所得结果分别与利用Levitus和高度计资料计算的流场进行比较。结果表明, 水团特性季节变化不明显, 春冬季表层水团与夏秋季比较表现为低温高盐; 次表层、中层和深层季节变化不大; 混合...
利用GHRSSTL4、QuikSCAT、OAFLUX以及SeaWiFSL3资料分析了近赤道罕见台风“画眉”生成前后海表温度SST及其感热通量、潜热通量和叶绿素a浓度的变化。在台风“画眉”生成之前, 中南半岛沿岸海表平均温度较其他区域低, 并且在南海盛行东北风, 在台风生成区有一明显的气旋性涡旋存在。南海北部地区潜热通量和感热通量均较大, 而在台风的生成区域仅感热通量较大。台风“画眉”使其路径右侧的...
以2005—2008年4年中南海北部开放航次所获得的水文观测资料为基础, 结合卫星高度计遥感资料, 采用动力计算方法计算南海18°N断面的经向地转流, 并与声学多普勒流速剖面仪(AcousticDopplerCurrentProfilers, ADCP)走航观测资料进行对比, 进而计算出通过南海18°N断面1000m以浅的各站位以及断面上总的经向地转体积、热、盐输运量。结果表明, 2005—200...
According to the traditional notion of randomness and uncertainty, natural phenomena are separated into two mutually exclusive components, random (or stochastic) and deterministic. Within this dichoto...