A5009081110- Forest ecology and management
- Remote Sensing and LiDAR Applications
- Plant Water Relations and Carbon Dynamics
- Tree Root and Stability Studies
- Forest Management and Policy
- Ecology and Vegetation Dynamics Studies
- Tree-ring climate responses
- Flood Risk Assessment and Management
- Landslides and related hazards
- Wildlife-Road Interactions and Conservation
- Marine and environmental studies
- Land Use and Ecosystem Services
- Transboundary Water Resource Management
- Water Quality and Pollution Assessment
- Fire effects on ecosystems
- Forest Biomass Utilization and Management
- Hydrology and Drought Analysis
- Mathematical and Theoretical Epidemiology and Ecology Models
- Agroforestry and silvopastoral systems
- Environmental Science and Water Management
- Nanoparticles: synthesis and applications
- Bioenergy crop production and management
- Carbon and Quantum Dots Applications
- Urban Green Space and Health
- Hydrology and Watershed Management Studies
Research Institute of Forests and Rangelands
2019-2025
Agricultural Research & Education Organization
2019-2025
University of South Carolina
2024
Lincoln University - Missouri
2024
University of Tehran
2013-2015
Floods are some of the most destructive and catastrophic disasters worldwide. Development management plans needs a deep understanding likelihood magnitude future flood events. The purpose this research was to estimate flash susceptibility in Tafresh watershed, Iran, using five machine learning methods, i.e., alternating decision tree (ADT), functional (FT), kernel logistic regression (KLR), multilayer perceptron (MLP), quadratic discriminant analysis (QDA). A geospatial database including...
The structure of a landscape is important as it affects the sources food for humans and other animals quality amount organic matter in water bodies. spatial arrangement features, especially variations patch size physical space between them, influences quantity materials that flow into bodies watercourses. In this study located Greater Caspian Sea Basin, we investigated how connectivity forest patches resulting corridors may influence water. From geographic databases graph theory developed 10...
The diameters and heights of trees are two the most important components in a forest inventory. In some circumstances, need to be estimated due time cost involved measuring them field. Artificial intelligence models have many advantages modeling nonlinear height–diameter relationships trees, which sometimes make more useful than empirical estimating trees. present study, uneven-aged mixed stands high elevation forests northern Iran were using an artificial neural network (ANN) model,...
The relative importance of different biotic and abiotic variables for estimating forest productivity remains unclear many ecosystems around the world, it is hypothesized that could also be estimated by local biodiversity factors. Using a large dataset from 258 monitoring permanent sample plots distributed across uneven-aged mixed forests in northern Iran, we tested relationship between tree species diversity examined whether several factors (solar radiation, topographic wetness index, wind...
Forest ecosystems play multiple important roles in meeting the habitat needs of different organisms and providing a variety services to humans. Biodiversity is one structural features dynamic complex forest ecosystems. One most challenging issues assessing understanding relationship between biodiversity environmental factors. The aim this study was investigate effect biotic abiotic factors on tree diversity Hyrcanian forests northern Iran. For purpose, we analyzed 8 sites locations from east...
Climate change has significant effects on forest ecosystems around the world. Since tree diameter increment determines volume and ultimately production, an accurate estimate of this variable under future climate is great importance for sustainable management. In study, we modeled current expected change, using multilayer perceptron (MLP) artificial neural networks linear mixed-effect model in two sites Hyrcanian Forest, northern Iran. Using 573 monitoring fixed-area (0.1 ha) plots, measured...
Mapping landscape variation in tree species richness (SR) is essential to the long term management and conservation of forest ecosystems. The current study examines prospect mapping field assessments SR a high-elevation, deciduous northern Iran as function 16 biophysical variables representative area's unique physiography, including topography coastal placement, environment, forests. Basic this development moderate-resolution surfaces associated plot-estimates for 202 permanent sampling...
Estimating the diameter increment of forests is one most important relationships in forest management and planning. The aim this study was to provide insight into application two machine learning methods, i.e., multilayer perceptron artificial neural network (MLP) adaptive neuro-fuzzy inference system (ANFIS), for developing models Hyrcanian forests. For purpose, diameters at breast height (DBH) seven tree species were recorded during inventory periods. trees divided four broad groups,...
Abstract Determining forest volume increment, the potential of wood production in natural forests, is a complex issue but fundamental importance to sustainable management. increment through growth and yield models necessary for proper management future prediction characteristics (diameter, height, volume, etc.). Various methods have been used determine productive capacity amount acceptable harvest forest, each has advantages disadvantages. One these involves artificial neural network...
This paper examines the possible ecological controls on diameter increment of oriental beech (Fagus orientalis Lipsky) in a high altitude forest northern Iran. The main objectives study are computer-generated abiotic surfaces and associated plot estimates (i) growing-season-cumulated potential solar radiation, (ii) seasonal air temperature, (iii) topographic wetness index representing soil water distribution, (iv) wind velocity generated from simulation fluid-flow dynamics complex terrain....
The Hyrcanian forests of Iran are mainly managed with the single-selection silvicultural technique. Despite significant ecological benefits associated selection cutting, this type forest management leads towards more challenging situations where it is difficult to maintain and practice successful forestry than in even-aged systems. Therefore, study provides relevant tools form models estimate low growth levels forests. In present study, estimation population rate then allowable cut these...
Abstract Background The Hyrcanian forests of Iran contain many species-rich communities that can only be maintained through an understanding the renewal and development these forests. Located in Jojadeh section Farim forest northern Iran, individual tree growth five distinct species [(Oriental beech ( Fagus orientalis Lipsky), chestnut-leaved oak Quercus castaneifolia Coss. ex J.Gay), Persian maple Acer velutinum Boiss.), common hornbeam Carpinus betulus L.) Caucasian alder Alnus subcordata...
Abstract Landscape structure is one of the most important factors affecting sources food and organic matter in rivers. The spatial patterns landscape patches including dimension variability gap sizes between contribute amount type materials discharged to waterbodies watercourses. We studied effects forest-patch connectivity corridors on water quality Greater Caspian Sea Basin. used 10 metrics 11 water-quality indicators developed from graph theory examine if contiguous/unfractured landscapes...
فقدان مدل های رویش و محصول، مدیریت یکپارچه جنگل (همه کارکرد مورد توجه قرار گیرد) را به تأخیر می اندازد. در این تحقیق که برای اولین بار داخل کشور بخش گرازبن خیرود وسعت934/24 هکتار انجام شد، با استفاده از 256 قطعه نمونه دائم 10 آری طی یک دوره نه ساله دوبار آماربرداری شده اند، مجموعه مدل هایی ارائه شد قادرند توسعه توده روش مختلف جنگل، شبیه سازی کرده درنهایت بهترین انتخاب کنند. ها بدون درنظرگرفتن شاخص رویشگاه سن اند شامل تک درخت قطری، ارتفاع، رویشی زادآوری (تعداد درختانی قطر بیشتر هفت سانتی...
The purpose of this study was to develop new methods describe outdoor recreation potential based on landscape indicators and systemic multicriteria evolution in the Tamarix forest reserves Varamin city, a part Iranian–Turanian forests Tehran province Iran. First, conducting evaluation, ecological factors that included slope, aspect, elevation, vegetation density, precipitation, temperature, soil texture were mapped, classified, coded according degree desirability for recreation. All these...