نتایج جستجو برای: use value in total wetland preservation value
تعداد نتایج: 17273185 فیلتر نتایج به سال:
external costs of environmental degradation are often ignored in economic analysis of projects. the mail goal of the paper is to economically analyze the current alternatives of meighan wetland utilization including extraction of sodium sulfate, aquaculture of artemia and integrative alternative considering external costs of wetland degradation. in order to detect eventual degradation of wetlan...
the aim of this study has been to find answers for the following questions: 1. what is the effect of immediate correction on students pronunciation errors? 2. what would be the effect of teaching the more rgular patterns of english pronunciation? 3. is there any significant difference between the two methods of dealing with pronuciation errore, i. e., correction and the teaching of the regular ...
this study was done to evaluate quality properties of pistacia atlantica var mutica (bene) nuts under deferent storage conditions and packaging. at the zero time, sfa and total tocopherol (tt) and total phenolic (tp) compounds were 6.8 and 725.28 and 40.1 mg per kg oil, respectively. some quality properties (peroxide value (pv), conjugated diene value (cdv) and carbonyle value (cv)) showed that...
anzali porter is one of the cities that is located in gilan province, is important because it's recreational and tourism attraction in the region. therefore, the study of recreational value can affect prediction requires, shortage removal and recreation expansion in the region. the purpose of current study is to estimate the recreational value of anzali wetland with contingent valuation me...
This study aims to evaluate the non-market values of ecosystem services generated by wetlands in Southern Quebec. To accomplish this, we evaluated the value of wetland services related to 1) habitat for biodiversity, 2) flood control, 3) water quality and 4) climate regulation. Two non-market valuation methods are proposed, contingent valuation (CV) and choice experiment (CE). Our study aims to...
During 2019, the length-weight, length-length relationships and condition factor of Caspian kutum, Rutilus kutum (Kamensky, 1901) were studied by catching a total of 339 specimens were collected from Chelvand, Khalehsara, Sefid, Khoshk and Shir rivers, Anzali Wetland and Turkmen Shores of the Caspian Sea basin. The equation W =aTLb was used to calculate the length-weight relationship, FL=a + b...
Local people rely heavily on the marine resources of the Asian Seas and coastal wetlands can provide benefits to local people, particularly through sustainable fishing and wetland related activities. The present level of recognition of this fact is low and therefore public support and awareness is very poor. Public support for marine biodiversity conservation is essential for gaining political ...
anzali wetland on the south west of caspian sea is a unique ecosystem was registered as ramsar site at 1975. anzali wetland was deteriorated due to numerous disorder and poor water quality. the riverin input were strongly affective in the process of eutrophication where the eastern and central region was more degraded. the first survey on the eutrophication process was conducted at 1969, since ...
the aim of this paper is eliminating cr(vi) by natural hap. hap is a inexpensive material which is used from bovine critical bone ash in order to remove heavy metal ions like cr(vi). some experiments in different ph are performed (ph=2,3,7). maximum adsorption was appeared at ph=2, dosage=0.3 gr, c0=10 mg/l. cr(vi) removal depends on ph value and initial amount of cr(vi) result of experiments w...
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