spatial pattern of trees is an important characteristic of plant communities. generating hypotheses relating to the structure of ecological communities is the aim of spatial pattern recognition. stands spatial patterns are measured and mapped by measuring tree locations in the stand and entering each coordinates into analytical frameworks. the spatial pattern of plant populations observed at an...

Silvicultural operation need to notice the species diversity. To this study Gomarlang district in marivan region, northern zagros forest was selected. In this study 30 circle sample plots (500 m2) were collected by random method. In every sample plot the kind of species and number of trees and shrub were recorded. In the sample plots the micro plots of 5 m by 5 m (i.e. area of 25 m2) were desig...

introduction the natural phenomenon events are involved with several natural and unnatural factors that play a specific role in it event. landslides, is example of such natural phenomena that resulted from interaction of various factors. understanding the impact and weight of each factor by mathematical models can be solution for landslide study in term of zonation and extraction. landslides ar...

zarivar lake is the only natural water area and the ponds in the kurdistan province which is located 2 kilometers far from the northwest of marivan city and at an altitude of 1285 meters above sea level. the mean annual rainfall is 997.6 mm and the mean annual temperature is 13°c. this study is carried out to survey the biodiversity, identification and introduce plant species around the lake an...

abstract. vegetation of each region is one of the most important phenomena of nature and is the best guide to judge about the ecological sciences of that region because the plants are resistant organisms that have endured the long term conditions of all kinds of environmental conditions for a long period of time and have adapted with environmental stresses. therefore floristical investigation o...

groundwater quality assessment and selection of appropriate methods of zoning depends on the region conditions, and data availability. the correct choice is a key milestone and a major step forward in the management of groundwater resources. the aim of this study was to evaluate the quality of groundwater for drinking and irrigation purposes in the west of marivan city, iran. for this purpose, ...

Silvicultural operation need to notice the plant species diversity in forest. To this study Gomarlang district in marivan region, northern zagros forest was selected. Selected 100 ha area because have similar physiography condition (north aspect and 1650 to 1800 m s.a.l. In study area 100 micro plots of 5m by 5 m (25 m2) including the species and the numbers of this species randomize...