نتایج جستجو برای: flood zonation

تعداد نتایج: 24960  

Journal: :Civil Engineering Journal 2023

A sedimentological study after the flash floods that hit North Luwu on July 13, 2020, has been carried out three affected rivers, namely Masamba River, Radda and Binuang River. The aims to determine impact of 2020 flood disaster, including sedimentation rate, annual bedload sediment volume, total sediments, which will be used as a reference for future mitigation consideration. is based fieldwor...

Journal: :پژوهش های جغرافیای طبیعی 0
ابراهیم مقیمی دانشیار دانشکده جغرافیا، دانشگاه تهران سیدکاظم علوی پناه دانشیار دانشکده جغرافیا، دانشگاه تهران تیمور جعفری دانشجوی دکترای جغرافیای طبیعی (ژئومورفولوژی)، دانشگاه تهران

abstract this survey accomplished for asessment and mechanism recognition of chenaran watershed landslide effective factors and its zonation based via lim model. primarily recognized effective factors, through studing and field survey and evaluated by landslide index method(lim) then based on their weight in model, landslide hazard zonation was done.then evaluated this model competence in zonat...

شرفی, سیامک , عباسی, حامد, مریانجی, زهره ,

Natural hazards are basically the changes that occur in environmental conditions, causing a disruption of the natural life of the people and their exposure to hazardous and degradable elements and elements. Establishing cities and residential areas on landforms has created new perspectives. The development of these areas has altered the geostationary balance of many landforms, and the response ...

Journal: :Land Use Policy 2022

Change triggered by natural hazards such as pluvial and coastal floods, sea-level rise well risks resulting from water scarcity are highly dynamic related to the effects of ongoing climate change. Whether how societies adapt, adjust, change, or transform because change risks, is a currently debated topic. This question demands revisiting comprehensively addressing existing theoretical foundatio...

Journal: :Ecological applications : a publication of the Ecological Society of America 2009
José M Fariña Brian R Silliman Mark D Bertness

We experimentally examined plant zonation in a previously unstudied Chilean salt marsh system to test the generality of mechanisms generating zonation of plants across intertidal stress gradients. Vertical zonation in this system is striking. The low-lying clonal succulent, Sarcocornia fruticosa, dominates the daily flooded low marsh, while intermediate elevations are dominated by the much tall...

2007
Lei Zhu

A new agricultural flood losses prediction method using digital elevation data combined with agricultural economic data is presented. The method is based on dynamically simulating the procedure of flood out. An example in Huangdunhu flood detention area, Jiangshu province of China has been given to describe how to use it to predict the incoming agricultural losses. Compared with prior methods, ...

2017
Nianqiang Zhang Na Li Jing Wang Sheng Chen Shaowei Qiu

Considering characteristics of high river density, special underlying surface in plain river network region, and municipal drainage system function, river network drainage unit model is proposed, which is defined as a region surrounded by main river or embankment. Flood storage variety and control projects regulation of small rivers in each unit is simulated. With drainage catchment as an objec...

Journal: :Int. J. Applied Earth Observation and Geoinformation 2010
Shivani Chauhan Mukta Sharma M. K. Arora N. K. Gupta

In thepresent study,ArtificialNeuralNetwork (ANN)hasbeen implemented toderive ratingsof categories of causative factors, which are then integrated to produce a landslide susceptibility zonation map in an

2012
Thomas F. Allnutt Timothy R. McClanahan Serge Andréfouët Merrill Baker Erwann Lagabrielle Caleb McClennen Andry J. M. Rakotomanjaka Tantely F. Tianarisoa Reg Watson Claire Kremen

The Government of Madagascar plans to increase marine protected area coverage by over one million hectares. To assist this process, we compare four methods for marine spatial planning of Madagascar's west coast. Input data for each method was drawn from the same variables: fishing pressure, exposure to climate change, and biodiversity (habitats, species distributions, biological richness, and b...

2016
Chaochao Li Xiaotao Cheng Na Li Xiaohe Du Qian Yu Guangyuan Kan

Flood risk analysis is more complex in urban areas than that in rural areas because of their closely packed buildings, different kinds of land uses, and large number of flood control works and drainage systems. The purpose of this paper is to propose a practical framework for flood risk analysis and benefit assessment of flood control measures in urban areas. Based on the concept of disaster ri...

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