搜索结果: 1-15 共查到“知识库 水文物理学”相关记录452条 . 查询时间(0.859 秒)
河海大学水文水资源学院地理信息科学专业介绍
河海大学水文水资源学院 水资源和水环境 水利工程 环境科学与工程
2022/6/24
历史沿革：地理信息科学专业起源于1952年华东水利学院（河海大学前身）建院时设立的水文系下的自然地理教研室，2000年设立地理信息系统专业并招生，是国内最早开设此专业的高校之一，2010年入选江苏省特色专业，2012年专业更名为地理信息科学。近三年在中国大学（校友会版）排名中持续保持全国第九。专业传承六十余年办学的优良传统，依托河海大学水文水资源和水环境等国家重点学科，形成了具有交叉性和综合性，行...
城镇化过程中由于开挖、堆垫以及路面硬化等建设活动，造成各种扰动地貌单元，其中，弃土弃渣堆积体是城镇主要的绿化用地及城市绿地建设客土来源；扰动地貌与原地貌单元共同组成城镇建设项目区的复杂下垫面。采用野外和室内试验方法，系统地比较了城镇建设中不同地貌单元的物质组成、入渗和持水性能的差异性，并探讨了三种城市土壤重构类型及其减缓城市内涝的潜在作用。结果表明：（1）不同地貌单元土壤容重差异显著（p<0.05...
华北平原原生富碘地下水系统中碘的迁移富集规律：以石家庄-衡水-沧州剖面为例
碘 迁移富集 地下水 华北平原
2018/3/11
高碘地下水是继高砷、高氟地下水之后的又一全球性饮水安全问题，但对地下水系统中碘的赋存形态及迁移富集机理研究尚显不足.为了解华北平原地下水系统中碘的空间分布特征及迁移富集规律，选取石家庄-衡水-沧州典型水文地质剖面，完成地下水样品采集，分析其水化学组成、总碘含量及碘形态组成特征，同时运用phreeqc完成水文地质剖面地球化学反向模拟及相关矿物饱和指数计算，定性定量表征水流场内所发生的水文地球化学过程...
Fabrication of high-performance PVA/PAN composite pervaporation membranes crosslinked by PMDA for wastewater desalination
Pervaporation Desalination Crosslinked PVA Composite membranes Wastewater treatment
2017/7/17
The pyromellitic dianhydride (PMDA) crosslinked poly(vinyl alcohol) (PVA) was coated on top of the PAN ultrafiltration membrane to form a PVA/PAN composite PV membranes for wastewater desalination. Th...
基于植被地下水关系的保水采煤研究
榆神府矿区 保水采煤 植被盖度 地下水
2017/6/5
为研究我国西部生态脆弱矿区植被与地下水关系及其对煤层开采的约束，采用路线穿越法剖析了典型区植被随潜水埋深变化的演替规律，利用遥感获取煤层开大规模采前(2000年)植被指数，并与同期地下水位埋深建立了统计关系。结果表明：研究区天然状态下植被随地下水位埋深的增加呈现明显的分带特征，潜水埋深0～4.0 m时植被对地下水依赖性较强；综合考虑水文地质条件和植被与地下水关系，榆神矿区可划分为植被约束区、地下水...
供水水库多目标生态调度研究
供水水库 生态需水,多目标生态调度 自适应遗传算法
2015/9/17
根据我国北方地区径流特征及供水水库调度的实际需求,构建了供水水库多目标生态调度模型。模型将下游
生态需水过程分为最小生态需水及适宜生态需水两个等级,要求枯水期水库放水过程能够满足河流最小生态需水
要求,确保下游生态不退化;丰水期放水过程贴近适宜生态需水过程,为下游提供良好生境。基于该模型,采用自适
应遗传算法,对承德双峰寺水库生态调度问题进行了优化求解,结果表明该模型能够对北方供水水库生态调...
动态差分进化算法在梯级水库优化问题中的应用
优化问题 差分进化 个体差异参数 算法可进化度参数
2015/9/14
采用标准差分进化算法在求解梯级水库优化问题时,随着解链长度的增加,算法求解性能下降,进化后期种群
多样性降低,算法极易陷入局部最优解。为此,定义了个体差异参数来动态控制差分进化算法的缩放因子,即定义
算法可进化度参数来动态控制算法的选择机制。通过对比标准差分进化算法、逐步优化算法和动态差分进化算法
求解2个标准测试函数和某梯级水库优化调度的模拟仿真结果,发现后者较前者的全局搜索能力有了显著提...
Groundwater Quality and Vulnerability Mapping of an Unconfined Coastal Aquifer
vulnerability index Chennai India
2015/8/14
Groundwater quality mapping is very essential to identify regions where groundwater is suitable for various uses. A study of the vulnerability of groundwater for pollution in a region is required as i...
Effect of land use-based surface roughness on hydrologic model output
land use-based surface roughness hydrologic model coefficient Manning
2015/8/14
The Manning’s roughness coefficient (n) is commonly used to represent surface roughness in lumped and distributed hydrologic models. Model parameter sensitivity studies identify runoff response to be ...
GIUH Based Transfer Function for Gomti River Basin of India
Basin CWC Direct runoff Geomorphology Gomti river Geomorphologic instantaneous unit hydrograph
2015/8/14
Geomorphologic instantaneous unit hydrograph (GIUH) can be used as a transfer function for modeling the transformation of excess rainfall into surface runoff, in which excess rainfall is an excitation...
An investigation of groundwater condition using geoelectrical resistivity method: A case study from some parts of Kaushambi district (U.P.) India
Groundwater Vertical Electrical Sounding VES Resistivity
2015/8/14
Twelve Vertical Electrical Sounding (VES) were carried out using Schlumberger configuration in parts of Kaushambi district (latitude 25o 15' 8'' and 25o 39' 55'' N. and longitude 81o 17' 5'' and 81o 3...
Assessment of Spatial Patterns of Sediment Transport and Delivery for Soil and Water Conservation Programs
off-site soil erosion soil erosion deposition model
2015/8/14
Soil erosion has tremendous impacts on most river systems throughout the United States. Such non-point pollution results from land-use and agricultural practices and leads to sedimentation downstream,...
Artificial Neural Network Application on Estimation of Aquifer Transmissivity
Aquifer Parameter Feed Forward Back Propagation
2015/8/13
The present study focuses on the unexplored area of application of artificial neural network in groundwater hydrology. Three models, each based on artificial neural networks, are applied for predictio...
Estimation of useful life of a reservoir using sediment trap efficiency
reservoir sedimentation trap efficiency Te
2015/8/13
The most important practical and critical problem related to the performance of reservoirs is the estimation of storage capacity loss due to sedimentation process. The problem to be addressed is to es...
Estimating Spatial Sediment Delivery Ratio on a Large Rural Catchment
soil erosion sediment yield sediment delivery ratio modelling
2015/8/11
Soil erosion and sediment yield from catchments are key limitations to achieving sustainable land use and maintaining water quality in streams, lakes and other water bodies. Controlling sediment loadi...