نتایج جستجو برای: geostatistical method

تعداد نتایج: 1632046  

Journal: :Advances in Water Resources 2023

We consider non-linear Bayesian inversion problems targeting the geostatistical hyperparameters of a random field describing hydrogeological or geophysical properties given data. This problem is particular importance in non-ergodic setting as there are no analytical upscaling relationships linking data to hyperparameters, such as, mean, standard deviation, and integral scales. Full local (typic...

Journal: :محیط زیست طبیعی 0
مهدی شیخ گودرزی کارشناسی ارشد محیط زیست، دانشکده منابع طبیعی، دانشگاه تهران، ایران سیدحسن موسوی کارشناسی ارشد محیط زیست، دانشکده منابع طبیعی، دانشگاه تهران، ایران نعمت الله خراسانی استاد محیط زیست، دانشکده منابع طبیعی، دانشگاه تهران، ایران

changes in groundwater quality, is caused destruction of other resources, either directly or indirectly, due to bad management of groundwater extractions. considering the importance of groundwater resources, especially in arid and semiarid regions, this research was done to modeling the spatial distribution of some groundwater qualitative factors with emphasis on drinking using geostatistical m...

Journal: :پژوهش های خاک 0
فاطمه کاراندیش استادیار گروه مهندسی آب دانشگاه زابل علی شاهنظری دانشیار گروه مهندسی آب دانشگاه علوم کشاورزی و منابع طبیعی ساری

soil temperature is one of the most effective parameters for plant growth. although the spatiotemporal monitoring of soil temperature is important for providing an optimum condition to maximize the yield efficiency, indirect measurements for zoning  of soil temperature are essential due to difficulties in direct methods of measuring it and also the limited measurement points. thus, the efficien...

1996
Angel Utset Maria Elena Ruiz Julian Herrera Daniel Ponce de Leon

Ž . A calibrated Four-Electrode Probe FEP was used for inexpensive and indirect determinations Ž . of salinity-sensor Electrical Conductivity EC in a plot at Cauto Valley, Cuba. Two transects Ž . Ž . were made in the North–South N–S and East–West E–W directions. Laboratory measurements of soil EC were also made from samples taken on a 50-m spaced square grid. A linear semivariogram was obtained...

2010
Gregoire Mariethoz Philippe Renard Julien Straubhaar

[1] Multiple‐point geostatistics is a general statistical framework to model spatial fields displaying a wide range of complex structures. In particular, it allows controlling connectivity patterns that have a critical importance for groundwater flow and transport problems. This approach involves considering data events (spatial arrangements of values) derived from a training image (TI). All da...

2002
Kyung-Mee Choi George Christakos

Modern geostatistical mapping methods are being applied to various types of data to produce more realistic and flexible characterizations of a natural random process. The Bayesian Maximum Entropy (BME) is a well-known geostatistical estimation method, especially for the use of soft knowledge as well as exact measurement data. Although development in geostatistical methods helps us to solve limi...

Heydar Zarei Keyvan Bolhasani,

Reference Evapotranspiration (ET0) is a basic parameter for determination of irrigation program. It is one of the most important factors in water resources management and considers as a requirement for every irrigation and drainage plans. Because of the spatial variations of ET0, it is necessary to use from intrapolation methods in order to estimation of this parameter in regional studie. Using...

2006
H. Mata Lima

In this article objective have been made to reviews different geostatistical methods available to estimate and simulate petrophysical properties (porosity and permeability) of the reservoir. Different geostatistical techniques that allow the combination of hard and soft data are taken into account and one refers the main reason to use the geostatistical simulation rather than estimation. Uncert...

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