نتایج جستجو برای: ilwis
تعداد نتایج: 168 فیلتر نتایج به سال:
This article deals with the application of spatial multiple criteria evaluation concepts and methods to support the decision-making process for site selection for waste disposal. The process makes use of a recently developed Spatial Multiple Criteria Evaluation (SMCE) module, integrated into ITC’s existing geographic information system called “ILWIS”. This module supports several compensatory a...
Satellite image time series provide valuable information on the Earth’s dynamics at a variety of spatio-temporal scales. Progress on information and communication technologies has greatly improved the access to such time series. For instance, the GEONETCast system freely distributes near real time raw satellite images and higher level products to end-users all over the word. This explains the u...
Landslide susceptibility mapping is one of the required activities in landslide prone area. This is intended to recognize the spatial probability of landslide as an action to minimize the upcoming impact. Landslide susceptibility map can be used as supporting information in spatial planning process as well, particularly in restricting landslide prone area as free of development zone . Currently...
Geostatistical mapping can be defined as analytical production of maps by using field observations, auxiliary information and a computer program that calculates values at locations of interest. Today, increasingly the heart of a mapping project is, in fact, the computer program that implements some (geo)statistical algorithm to a given point data set. Purpose of this guide is to assist you in p...
This study investigates the possibility providing gully erosion map by the supervised classification of satellite images (ETM) in two mountainous and plain land types. These land types were the part of Varamin plain, Tehran province, and Roodbar subbasin, Guilan province, as plain and mountain land types, respectively. The position of 652 and 124 ground control points were recorded by GPS respe...
Original scientific paper In recent years information technology has grown very rapidly. In the context of GIS, Free/Open source concept and also three-dimensional implementation have had more development too. The usage of these types of software is increasingly growing because of reasons such as security, open standards, vendor independence. In this regard, one of the most significant problems...
The accurate estimation of the hydrologic response in water resources planning and development is crucial. In this study, rainfall-runoff relationship Devgadh Baria watershed Panam river catchment were investigated. Due to limited availability accuracy runoff data, Clark UH, SCS UH models explored for estimation. Remote sensing GIS techniques integrated assess ungauged Middle Gujarat region.&#x...
انتقال و انباشت رسوب در سدهای مخزنی سبب کاهش حجم و عمر مفید مخازن ذخیره آب میگردد. با توجه به اهمیت آب و کمبود منابع آن و هزینه بالا و زمان بر بودن احداث مخازن، به خصوص کمبود ساختگاه مناسب جهت احداث مخازن جدید، اهمیت بررسی پدیده انباشت رسوب در مخازن، را جهت ارایه راهکاری مناسب، از لحاظ صرف وقت و هزینه در برآورد، پیشبینی رسوب مخزن و ارایه فرامین مدیریتی در کنترل مخازن را کاملا مشهود میسازد. ا...
انتقال و انباشت رسوب در سدهای مخزنی سبب کاهش حجم و عمر مفید مخازن ذخیره آب می گردد. با توجه به اهمیت آب و کمبود منابع آن و هزینه بالا و زمان بر بودن احداث مخازن، به خصوص کمبود ساختگاه مناسب جهت احداث مخازن جدید، اهمیت بررسی پدیده انباشت رسوب در مخازن، را جهت ارایه راهکاری مناسب، از لحاظ صرف وقت و هزینه در برآورد، پیش بینی رسوب مخزن و ارایه فرامین مدیریتی در کنترل مخازن را کاملا مشهود می سازد. ا...
the transfer and sedimentation in storage dams reduce the volume and damage the life of water reservoirs. due to the importance of water, its storage, and the cost time of constructing reservoirs, especially the scarcity of construncting sites for them, a lot of attentions should be given to the sedimentation of dam reservoirs. it requires the estimate of thew sedimentation and its management. ...
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