搜索结果: 16-30 共查到“知识库 水文地理学”相关记录520条 . 查询时间(4.291 秒)
Land Use/Land Cover Changes and Groundwater Potential Zoning in and around Raniganj coal mining area, Bardhaman District, West Bengal - A GIS and Remote Sensing Approach
Land Use Land Cover Groundwater Zoning
<
2015/8/6
The Raniganj area has a long history of coal mining starting from 1744. This has resulted in major change in land use pattern and high groundwater abstraction leading to drinking water crisis especial...
Hydrogeology of the Northern Gezira Area, Central Sudan
aquifer transmissivity hydraulic conductivity chemical analyses hydrochemical composition
<
2015/8/6
The aim of this study was to determine the hydraulic properties of the aquifers, evaluate the chemical characteristics of groundwater, and construct a water level and hyrochemical maps. Jacob’s, and T...
在对水资源系统进行模拟分析的基础上,结合江苏省南水北调受水区水文水资源、水利工程等特点,构建流域
降雨径流模型、水动力学模型、水量调配模型以及水工程调度模型等子模型,对受水区水资源量、供需水量等进行研
究。基于所建模型提出水利工程调度方案,对研究区水资源进行合理配置。分别模拟计算分析研究区内农业、工
业、生活、生态和船闸用水户在现状与规划工情下不同水平年的供水、需水、缺水情况,制定水资源配置...
分别在462W、595W、700W微波功率下,对不同含水率的疏浚底泥进行微波干燥试验,微波干燥过程经历了
加速干燥、恒速干燥和降速干燥阶段,试验结果表明底泥的干燥速率、含水率及温度变化符合典型干燥特征曲线。
通过分析不同因素对疏浚底泥微波干燥特性的影响,发现含水率下降曲线受底泥初始含水率的影响不大,低功率
(462W)下含水率下降趋于平缓,高功率(595W、700W)下含水率急剧下降;含水率...
椭圆指数函数降水空间插值模型
降水 分布式水文模型 降水分布模型 空间插值
<
2015/9/17
如何将基于站点观测的降水数据转化为分布式水文模型所需的空间分布降水数据,是分布式水文模型模拟流
域水文过程的前提。椭圆指数函数模型具有能够指明降水中心位置及中心降水量的优点,但与其他空间插值模型
比较,椭圆指数函数模型的插值结果如何尚需进行比较研究。将椭圆指数函数模型与距离倒数权重模型、空间线性
插值模型、修正距离倒数模型等降水空间插值模型分别应用于SantaCatalina岛3场次降水分布...
Characteristics of extreme heavy precipitation events occurring in the area of Cracow (Poland)
autocorrelation Hershfield’s statistical method probability distribution probable maximum precipitation spectral analysis
<
2015/3/10
The variability of extremely heavy precipitation events with duration of 120 min occurring in the area of Cracow, southern Poland was assessed. The analysis was performed using time series of maximum ...
为了能够更好地进行中长期径流预报,对1965年-2013年的丹江口水库月平均入库流量进行径流特性分
析。首先采用线性回归法和Mann2Kendall检验法进行趋势分析,然后采用Pettitt突变检验法、Morlet小波法分别进
行突变分析与周期分析。结果表明,1965年-2013年间丹江口径流量呈下降趋势,并且分别存在3~5a、7~9a、18~
20a的显著周期性。建议进行中长期年径流预报时...
Impact of landuse on runoff in mountain catchments of different scales
hydrological regime landuse change
<
2015/2/4
The paper presents two approaches to the analysis of the impacts of landuse changes on hydrological regime in mountain catchments of northern Slovakia. An intersite comparison of measured data along t...
Runoff formation in a tile-drained agricultural basin of the Harz Mountain Foreland, Northern Germany
hydrograph separation hydrological tracers isotopes dyes groundwater drain sampler
<
2015/2/4
By taking two different tile-drained agricultural basins with porous aquifers in the lowlands of northern Germany as examples, it is demonstrated with an integrated study approach that this type of ba...
Entropy production by evapotranspiration and its geographic variation
hydrologic cycle evapotranspiration land surface entropy production principle of Maximum Entropy Production vegetation effects
<
2015/2/3
The hydrologic cycle is a system far from thermodynamic equilibrium that is characterized by its rate of entropy production in the climatological mean steady state. Over land, the hydrologic cycle is ...
Analysis of land use change in the Eastern Ore Mts. regarding both nature protection and flood prevention
hydrological modeling runoff generation land use change
<
2015/2/3
Two different models (WBS FLAB, WaSiM-ETH) were used in the project HochNatur (flood prevention and nature conservation in the Weißeritz catchment in the Eastern Ore Mts. – Erzgebirge) to determi...
Soil water retention and gross primary productivity in the Zábrod area in the Sumava Mts
hydrologic cycle evapotranspiration gross primary productivity entropy production soil water retention
<
2015/2/3
The synergy between the hydrologic extremes, plant transpiration, gross primary productivity, and soil water retention was studied in the experimental area Zábrod – Meadow in the Šumava Mts. (Boh...
Remote sensing & GIS applications for drainage detection and modeling in agricultural watersheds
Remote Sensing GIS
<
2015/1/16
The primary objective of this research involves mapping out and validating the existence of sub surface drainage tiles in a given cropland using Remote Sensing and GIS methodologies. The process is de...
Nitrogen, Phosphorus and Carbon Dynamics during Storms in a Glaciated Third-Order Watershed in the US Midwest
DOC nitrate phosphorus hydrology
<
2015/1/16
The characterization of the nutrients nitrogen, phosphorus and carbon (NPC) export to streams during storms is an integral part of understanding processes affecting water quality. Despite the fact tha...
Analysis of Mercury Concentrations in Indiana Soil to Evaluate Patterns of Long-Term Atmospheric Mercury Deposition
atmospheric deposition mercury emission soil mercury concentration
<
2015/1/16
Mercury (Hg) has proven to be a risk to the public, mainly through the consumption of fish. Because of this, many fish consumption advisories have been issued in Indiana. Although much is known about ...