搜索结果: 1-15 共查到“知识库 水文测量 soil”相关记录32条 . 查询时间(0.125 秒)
Groundwater Flow Model and Particle Track Analysis for Selecting Water Quality Monitoring Well Sites,and Soil Sampling Profiles
Mechanic villages heavy metals modelling pollution studies Imo River basin
2015/8/14
Researchers often use only surface drainage (imperical method) as a tradition to locate sites for installation of water quality monitoring wells, and soil sampling profile for pollution studies in urb...
Support Soil Conservation Practices by Identifying Critical Erosion Areas within an American Watershed Using the GIS-AGNPS Model
AGNPS C factor erosion GIS Iowa T value water quality modeling
2015/8/11
Eroded soil from overland is one of the major nonpoint pollution sources in many watersheds. The subsequent sediment not only reduces conveyance capacity of streams and usable storage volume of reserv...
Spatial variability of water repellency in pine forest soil
spatial variability water repellency WDPT test infiltration sorptivity
2015/2/3
The variability of water repellency of pine-forest arenic regosols and its influence on infiltration processes were measured in southwest Slovakia. The water drop penetration time (WDPT) tests of soil...
A comparison of ASCAT and modelled soil moisture over South Africa，using TOPKAPI in land surface mode
ASCAT modelled soil moisture South Africa TOPKAPI land surface mode
2010/4/7
In this paper we compare two independent soil moisture estimates over South Africa. The first estimate is a Soil Saturation Index (SSI) provided by automated real-time computations of the TOPKAPI hydr...
Frozen soil parameterization in a distributed biosphere hydrological model
Frozen soil parameterization distributed biosphere hydrological model
2010/4/7
In this study, a frozen soil parameterization has been modified and incorporated into a distributed biosphere hydrological model (WEB-DHM). The WEB-DHM with the frozen scheme was then rigorously evalu...
Technical Note:Comparing and ranking soil drought indices performance over Europe,through remote-sensing of vegetation
Technical Note soil drought indices performance remote-sensing vegetation
2010/2/20
In the past years there have been many attempts to produce and improve global soil-moisture datasets and drought indices. However, comparing and validating these various datasets is not straightforwar...
Implementing small scale processes at the soil-plant interface – the role of root architectures for calculating root water uptake profiles
small scale processes soil-plant interface root architectures root water uptake profiles
2010/2/20
In this paper, we present a stand alone root water uptake model called aRoot, which calculates the sink term for any bulk soil water flow model taking into account water flow within and around a root ...
Relating surface backscatter response from TRMM precipitation radar to soil moisture:results over a semi-arid region
surface backscatter response TRMM precipitation radar soil moisture
2010/2/20
The Tropical Rainfall Measuring Mission (TRMM) carries aboard the Precipitation Radar (TRMMPR) that measures the backscatter (σ°) of the surface. σ° is sensitive to surface soil moisture and vegetatio...
Soil moisture active and passive microwave products:intercomparison and evaluation over a Sahelian site
Soil moisture active passive microwave products intercomparison evaluation Sahelian site
2010/2/1
This paper presents a comparison and an evaluation of five soil moisture products based on satellite-based passive and active microwave measurements. Products are evaluated for 2005–2006 against groun...
Quantification of tillage,plant cover,and cumulative rainfall effects on soil surface microrelief by statistical,geostatistical and fractal indices
tillage plant cover cumulative rainfall effects soil surface microrelief
2009/11/2
Changes in soil surface microrelief with cumulative rainfall under different tillage systems and crop cover conditions were investigated in southern Brazil. Surface cover was none (fallow) or the crop...
On the scaling characteristics of observed and simulated spatial soil moisture fields
scaling characteristics observed simulated spatial soil moisture fields
2009/10/30
By providing continuous high-resolution simulations of soil moisture fields, distributed hydrologic models could be powerful tools to advance the scientific community's understanding of the space-time...
NUMERICAL ANALYSIS OF FINITE DEPTH PROBLEMS IN SOIL-WATER HYDROLOGY
NUMERICAL ANALYSIS FINITE DEPTH PROBLEMS SOIL-WATER HYDROLOGY
2009/10/29
The types of initial and boundary conditions which may be involved in the
flow of water through an unsaturated profile to a water table are discussed.
A numerical solution of the flow equation is th...
The lysimeter installation described comprises 36 concrete tanks each with
a soil surface of 4 m2.. The installation is useful for plant growth experiments
under natural conditions involving differe...
Application of Soil Water Flow Theory in Field Simulation
Application Soil Water Flow Theory Field Simulation
2009/10/28
A numerical model based on a finite difference approximation of the basic
differential equation for soil water flow is described. The equation includes a
sink term representing moisture extraction b...
Selected Effects of Field Variability on Predictions from a Soil Water Finite Difference Model
Field Variability Predictions Soil Water Finite Difference Model
2009/10/28
Known field variability of soil hydrologic parameters is incorporated into a
general finite difference scheme for the prediction of near surface soil water
conditions, including runoff. It is shown ...