Tarbiat Modares University (TMU) ECOPERSIA 2322-2700 2 2 2014 06 01 Assessing the Role of Some Soil Properties on Aggregate Stability Using Path Analysis (Case Study: Silty-Clay- Loam and Clay-Loam Soil from Gully Lands in North West of Iran) 513 523 17114 EN Behnam Farid Giglo MSc. Student, Faculty of Range and Watershed Management Engineering, Gorgan University of Agricultural and Natural Resources Sciences, Gorgan, Iran Abdolhossein Arami MSc. Student, Faculty of Range and Watershed Management Engineering, Gorgan University of Agricultural and Natural Resources Sciences, Gorgan, Iran Davoud Akhzari Assistant Professor, Faculty of Natural Resources, Malayer University, Malayer, Iran. Journal Article Soil characteristics is very important in water erosion processes. The present investigation was conducted in gully lands of Ardebil Province, Iran, to assess the role of soil texture and structure on aggregate stability using wet sieve method. To achieve the study purposes, mean weighted diameter of aggregates was calculated, and its relationships with lime and clay percentages, sodium absorption ratio and soil organic matter were then determined. The research results showed, in the first and second depth, the organic matter had the highest direct and positive effect on aggregate stability. In first depth, clay and lime had a direct and positive effect on aggregate stability. In both depths, sodium absorption ratio had the highest but negative effect on aggregate stability. Organic matter and clay had the highest direct and positive effect on aggregate stability in the second depth. The highest indirect effect of the parameters on aggregate stability was in second depth due to effect of clay and organic matter on each other. In second depth, lime had the direct and positive effect on aggregate stability. Sodium absorption ratio had a direct and negative effect on aggregate stability in both study depths.

https://ecopersia.modares.ac.ir/article_17114_6644fa94782af6fb1d0b7e7d09f19804.pdf

Tarbiat Modares University (TMU) ECOPERSIA 2322-2700 2 2 2014 06 01 Sediment and Runoff Measurement in Different Rangeland Vegetation Types using Rainfall Simulator 525 538 17115 EN Soheila Aghabeigi Amin Assistant professor, Faculty of Agriculture and Natural Resources, Razi University, Kermanshah, Iran Hamid Reza Moradi Associate professor, Faculty of Natural Resources, Tarbiat Modarres University, Nour, Iran Bakhtiar Fattahi Scientific Member, Faculty of Natural Resources, Malayer University, Malayer, Iran Bakhtiar Fattahi Scientific Member, Faculty of Natural Resources, Malayer University, Malayer, Iran Journal Article Soil erosion is an abstruse phenomenon which contains segregation and transmission of soil particles and runoff from rainfall and infiltration. Runoff and sediment generation was compared using rainfall simulator in grassland (St. parviflora-Br. tomentellus) and shrubland (As. parrowianus-As. gossipinus). For this purpose, vegetation map was supplied for two vegetation types four main aspects and two slope classes (12%-20% and 20%-40%) and corresponding work units were accordingly determined Three points were selected in each unit and rainfall simulator set inside them through a randomized pattern. The intensity of rainfall simulation was 1.6 mm min-1 with 10 minute duration and then runoff and sediment were measured. One soil sample (depth of 0–40 cm) was collected and assessed for pH, OM, EC, P, K, Ca, Mg and texture in the laboratory at the vicinity of the study area. The results of Duncan test and multiple regressions showed that grassland had more runoff and sediment than shrubland, but initial time of runoff in grassland was less than shrubland. Also aspects, slopes and soil characteristics (EC, Ca, Clay, P) had significant effects on runoff, sediment and initial time and they had linear correlation with runoff and sediment.

https://ecopersia.modares.ac.ir/article_17115_517190615c497358dbdf405aeac44c5b.pdf

Tarbiat Modares University (TMU) ECOPERSIA 2322-2700 2 2 2014 06 01 Storm-Wise Sediment Production of Gully Erosion in the West of Iran 539 556 17116 EN Farhad Nourmohammadi PhD Student in Watershed Management and Science, Faculty of Natural Resources, Lorestan University, Khorambad, Iran Majid Soufi Fars Research Centre for Agriculture and Natural Resources, Shiraz, Iran. Shahram Mirrezaie MSc Student, Faculty of Natural Resources, Isfahan University of Technology, Isfahan, Iran. Vahid Kazemi MSc Student, Faculty of Natural Resources, Yazd University, Yazd, Iran. Seyed Hamidreza Sadeghi Professor, Faculty of Natural Resources, Tarbiat Modares University, Noor, Iran. Hamidreza Karimzadeh Assistant Professor, Faculty of Natural Resources, Isfahan University of Technology, Isfahan, Iran. Mohammadreza Ekhtesasi Associate Professor, Faculty of Natural Resources, Yazd University, Yazd, Iran. Mohsen Sheklabadi Assistant Professor, Faculty of Natural Resources, University of Boo Ali Hamadan, Hamadan, Iran. Hamidreza Azimzadeh Assistant Professor, Faculty of Natural Resources, Yazd University, Yazd, Iran. Journal Article Different types of soil erosion including gully erosion occur in many parts of Iran. The west of Iran is further threatened by gully erosion due to its specific physical and climatic conditions. However, few studies have been carried out to study the sediment production of gully erosion in Iran. This research was therefore conducted to measure storm-wise sediment production of gully erosion in the west of Iran. To achieve the study objectives, 48 gullies located in three small watersheds viz. Darreh-Shahr, Abbas-Abad and Hollowsh in Ilam and Lorestan Provinces were monitored. The volumes of gullies were measured before and after 5 rainstorms for Darreh-Shahr and Abbas Abad watersheds and 6 rainstorms for Hollowsh watershed from 2005 to 2007. Sediment production was calculated on storm basis for each gully. The results revealed that the minimum and maximum volumes of gully erosion were 0.002 and 1.010 m3, respectively, for one millimeter of rainfall. The results indicated that soil moisture, percentage of silt and clay, amount and intensity of rainfall and drainage area were the most important factors on formation and sediment production of gully erosion.

https://ecopersia.modares.ac.ir/article_17116_029b50deea7a25c41e489e6ee3635e52.pdf

Tarbiat Modares University (TMU) ECOPERSIA 2322-2700 2 2 2014 06 01 Prioritizing Effective Factors on Development of Medicinal Plants Cultivation using Analytic Hierarchy Process (Case study: North Khorasan Province, Iran) 557 569 17117 EN Ghorbanali Rassam Assistant Professor, Shirvan College of Agricultural Sciences and Natural Resources, Ferdowsi University of Mashhad, Shirvan, Iran. Alireza Dadkhah Associate Professor, Shirvan College of Agricultural Sciences and Natural Resources, Ferdowsi University of Mashhad, Shirvan, Iran. Armin Mashayekhan Young Researchers and Elite Club, Islamic Azad University, Gorgan Branch, Gorgan, Journal Article This research conducted in order to prioritize the effective criteria on development of medicinal plants cultivation in North Khorasan Province using Analytical Hierarchy Process (AHP) and Delphi methods. For this purpose, a list of effective factors offered to delphi group. Analysis of delphi process showed that among 23 offered factors 19 factors, had greater impact on development of medicinal plants cultivation. Hierarchy tree was drawn through grouping of 19 factors into four criteria including economic, promotional-educational services, cultural-social and supportive policies factors. The pair wise comparison questionnaires were then distributed among relevant researchers and experts of the province to get their opinions about the priority of criteria and sub- criteria. The questionnaires were analyzed using Expert Choice software. The result revealed that economic criterion with respective weight of 0.406 had the most impact among four criteria affecting the development of medicinal plants cultivation. The supportive policies (respective weight of 0.275), educational-extension services (respective weight of 0.193) and cultural-social factors (respective weight of 0.125) received the maximum towards the minimum priorities, respectively. The results of synthesis process showed that among the 19 factors, the guaranteed purchase and establishing of pilot fields of medicinal plants, farmers' awareness of comparative advantage of medicinal plants, and the development of processing industries had the maximum towards minimum impacts on development of medicinal plants cultivation.

https://ecopersia.modares.ac.ir/article_17117_9bc09ac880e071ceb1d63cdafdce6e84.pdf

Tarbiat Modares University (TMU) ECOPERSIA 2322-2700 2 2 2014 06 01 Effect of Superabsorbent Polymer Aquasorb on Chlorophyll, Antioxidant Enzymes and Some Growth Characteristics of Acacia Victoriae Seedlings under Drought Stress 571 583 17118 EN Afsaneh Tongo Formar Master Student, Faculty of Natural Resources, Industrial University of Khattam Anbia, Behbahan, Iran Ali Mahdavi Associate Professor, Faculty of Agriculture, University of Ilam, Ilam, Iran Ehsan Sayad Assistant Professor, Faculty of Natural Resources, Razi, University, Kermanshah, Iran Journal Article To investigate the effect of droughtstress on chlorophyll content, enzymatic responses and some growth characteristics of Acacia victoriae seedlings and the effect of super-absorbent polymers (SAP) in reducing drought stress, a split plot experiment based on the completely randomized design was conducted. The treatments included four levels of drought stress (15, 30, 60 and 100% of field capacity) and four levels of SAP (0, 0.2, 0.4 and 0.6% weight percentages). The results of ANOVA showed a significant effect of drought stress on all growth characters, chlorophyll content and catalase and peroxidase enzymes activity, while the SAP didn't show any significant effect on the weight and areas of the leaves. The interaction effect between drought stress and SAP on the weight, number of leaves, proportion of root dry weight to aerial organs, chlorophyll and peroxidase enzyme activity was also significant. The effect of drought stress on reducing the number of the leaves, leaf area, length, volume and surface of roots and also increasing the root dry weight to aerial organs dry weight ratio, amount of chlorophyll and activity of antioxidant enzymes was significant. The different levels of SAP could absorb and hold water and consequently reduce the effect of drought stress and improve the growth characteristics and reduce the activity of catalase and peroxidase enzymes.

https://ecopersia.modares.ac.ir/article_17118_c8983c1f5369930e88b760c5fd493336.pdf

Tarbiat Modares University (TMU) ECOPERSIA 2322-2700 2 2 2014 06 01 Climate Change Induced Water Conflict in the Himalayas: A Case study from Mustang, Nepal 585 595 17119 EN Jagat Bhusal Former Master Student, SOHAM, Nepal. Bhim Subedi Professor, Central Department of Geography, TU, Nepal. Journal Article The water remains at the centre of livelihood from the beginning of human civilization. Civilization enriched mostly on the fertile plains and river valleys. With times, people began migrating to highland slopes where there was easy access to water to use. Two villages in Mustang region of Nepal were considered for research to drill the causes of conflicts on water sources right and water shares. People’s perception, traditional practices and field evidences from those two villages were collected and analyzed. There were no any conflicts over water rights between two villages over long period in the past (until 200 to 300 years before). When the natural hydrological process derailed, people felt effects in decreasing in agro products and pasture due to scarce waters. Worsening livelihoods reflected to conflicts over water in the area. Communities were not only demanding greater portion of water share but also were claiming exclusive right over sources. The inherent cause of conflict were climate change which appeared through dyeing springs and changing nature of hydrological cycles.

https://ecopersia.modares.ac.ir/article_17119_bf65f07beaf1780ac1cf7dcf51cc8bfc.pdf

Tarbiat Modares University (TMU) ECOPERSIA 2322-2700 2 2 2014 06 01 Performance of Classification Methods to Evaluate Groundwater (Case Study: Shoosh Aquifer) 597 612 17120 EN Mohamad Sakizadeh Assistant professor, Faculty of Sciences, Shahid Rajaee Teacher Training University, Tehran, Iran Journal Article The objective of this study was to classify the Shoosh Aquifer to several zones with different water quality in Khuzestan Province, Iran. In this regard, the performance of classification methods (Discriminant function and Cluster analysis) for the classification of groundwater based on the level of pollution with an emphasis on the problem of over-fitting in training data were considered. An over-fitted model will generally have poor predictiveperformance, as it can exaggerate minor fluctuations in the data. Cluster Analysis(CA) was adopted to spatially explain the similarity of sampling stations with respect to measured parameters. Three methods for variable selection were used including regularized discriminant analysis, principal component analysis and Wilks's lambda method. The best algorithm for variable selection was Wilks'lambda which resulted in reducing the generalization error of the test sample to 0.1 for leave-one-out and 4-fold cross-validation. The second best performed algorithm was regularized discriminant function with 0.167 and 0.133 misclassification error for the two above-mentioned methods, respectively. Principal component analysis did not proved to be a promising algorithm for variable selection in the classification methods.

https://ecopersia.modares.ac.ir/article_17120_d72eecc6b164864790fe25f2bd64a8ab.pdf