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وحید حسینی نوه احمد
آبادیان
author
text
article
2002
per
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
33
v.
1
no.
2002
https://jijas.ut.ac.ir/article_10942_129e18de58008f1e154143b16550e530.pdf
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مجید
کوپاهی
author
text
article
2002
per
Agricultural Bank of Islamic Republic of Iran- the main institution of formal agricultural credit supply in Iran - is responsible for providing financial resources for the agricultural sector. A main part of financial resources of Agricultural Bank comes via recovery of the overdue granted credits. Timely recovery of the credits is very crucial for viability of the Agricultural Bank. Therefore, it becomes necessary for the managers of the bank to know the factors affecting agricultural credit repayment performance to adopt further suitable policies. To achieve this goal, the present study was performed using data obtained, through filling questionnaires, from a sample of 149 farmers who had previously received credit from Agricultural Bank, in the province of
Birjand. The sample was selected by using a two stage random sampling method. Discriminant analysis method was used to discriminate the defaulters from nondefaulters. The results indicated that use of machinery, length of repayment period, bank supervision on the use of loan, and using of loan in current activities had significant and positive effects on the agricultural credit repayment performance. On the
other hand, incidence of natural disasters (e. g. droughts, and diseases), higher level of
education of the recipient of loan, and length of waiting time for loan reception had a significant and negative effect on the agricultural credit repayment performance.
Finally, based on the conclusions obtained, several policy oriented recommendations were made.
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
33
v.
1
no.
2002
https://jijas.ut.ac.ir/article_10943_562f2d25f079d5e3e1f79d73e7e3ceed.pdf
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محمدرضا
عطارباشی
author
سراله
گالشی
author
text
article
2002
per
To study the relationship of phenology and physiological traits of rainfed wheat yield and yield components, 13 bread wheat (Triticum aestivum 1.) cultivars namely Atila, Atrak, Alborz, Inia, Bakonara, Pastoor, PRI, Tajan, Zagros, Falat, Khazar, Golestan and Vinak were evaluated under rainfed conditions during 1998 growing season. The experimental design was a randomized complete block one with four replicates. The results of the experiment revealed that improvements in grain yield were associated with increases in biological yield, harvest index, allocation efficiency, grain filling rate, grain number per unit area and grain number per spike. Days to physiological maturity and grain filling duration exhibited a negative correlation with grain yield. Traits such as days to anthesis, total biomass in anthesis and grain weight were not significantly related to grain yield.
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
33
v.
1
no.
2002
https://jijas.ut.ac.ir/article_10944_a0be72b8ba6749fb46957b1c33d2f8b3.pdf
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قربانعلی نعمت
زاده
author
محمد تقی
کربلایی
author
text
article
2002
per
Aroma inheritance was studied in a cross between Basmati 370 from Pakistan and India as an aromatic rice and IR36 from IRRI, an improved non-aromatic cultivar. F 1, F2, and the progenies were analyzed [40 seeds (F3) from each plant] and the genotype of F2 plants being determined accordingly. Pattern of F2 segregation for non aroma was 3: 1 [19 homozygous non scented, 68 heterozygous and 36 homozygous scented plants (X2=1.l95)], indicating that aroma is controlled by a recessive gene in these cultivars.
This result was confirmed by analyzing F2 population with RAPD marker (AG8-AR) that is tightly linked to the aroma. The pattern of F2 segregation linked to AG8-AR marker was 3: 1 [32 aromatic bands and 12 non aromatic bands (X2=0.12)]. A number of 1236 single seeds analyzed in F2 progenies, showed that 524 were non aromatic (IR 36 type), 320 as slightly aromatic, 133 seeds moderately aromatic (intermediate aromatic) and 259 as strong aromatic (Basmati 370 type). In this case of evaluation aroma is categorized into four classes (non, slight, moderate and strongly aromatic) instead of in two classes (non aromatic and aromatic). The results indicate that aroma is controlled by at least two genes.
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
33
v.
1
no.
2002
https://jijas.ut.ac.ir/article_10945_49ee3a7b45cb8b4d76ae7d04db4e89dc.pdf
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علی ایزدی
دربندی
author
بهمن یزدی
صمدی
author
سیروس
عبدمیشانی
author
علی اکبر شاه نجات
بوشهری
author
فرج اله
شهریاری
author
text
article
2002
per
Variation in LMW- glutenin subunits was studied in 67 bread wheat varieties. The glutenin and gliadin proteins were extracted through sequential extraction procedure. One - step 1- dimensional SDS-PAGE with 8.1-12.5% gradient gel was used for separation of glutenin & gliadin in subunits. Seventeen Glu-I subunits and 19 Glu-3 subunits were recognized. A new subunit in Glu-1 (2**+10*) was observed in 4 of the varieties, 7(a) and lO(i) subunits were seen independently in 2 varieties, however, 1 By and 1Dx were not expressed. In Glu-1, the 2+12(a), 7+8(b) and null (c) had the highest frequencies of 0.71, 0.64 and 0.56, respectively. Glu-A3c, Glu-B3b and Glu-D3b in Glu-3 constituted the most frequent subunits, with 0.4, 0.25 and 0.35 relative frequencies respectively. Compared to Glu-1, the variation in each locus and also the overall mean variation of Glu-3 were higher. co- gliadins showed higher variation than total variation Glu-1 or Glu-3 subunits, but lower than total variation Glu-1 and Glu-3. The maximum variation being observed, when the Glu-I, Glu-3 and co-gliadin were taken into consideration together. Only varieties Alamoot 1 and Alamoot 2 were similar at HMW, LMW and co-gliadin loci, the results indicated the following order of variation in different loci.
coGli & Glu-3 & Glu-l> Glu-3 & Glu-l> coGli>Glu-3>Glu-1.
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
33
v.
1
no.
2002
https://jijas.ut.ac.ir/article_10946_e8c2b1eda2d276e89e5d1876a76ba7b3.pdf
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کاظم
پوستینی
author
text
article
2002
per
In a greenhouse study the effects of salinity stress on thirty wheat cultivars were evaluated, employing a factorial experiment in a completely randomized block design with three replications. Tap water (EC=O.6 d sm-!) was used for control, and an increasing concentration of NaCI in water, up to an EC of 16 d sm-! was used to represent the salinity treatment. Kharchia - 66 as an internationally known salt tolerant
wheat cultivar was one of the selected cultivars while others being Iranian ones eight of
which are known to be salt tolerants. These are: Alvand, Roshan, Sorkh- tokhm, Sholeh, Tabasi, Kavir, Mahooti and Mahdavi. The results showed that regarding grain and shoot dry weight, seventeen cultivars, in which were included Kharchia-66 and six other salt tolerant ones exhibited a higher absolute tolerance to salinity. The significant correlations observed between shoot and grain dry weight, and grain filling period in saline conditions is indicative of the fact that extension of the grain filling duration and its amounting to a greater grain dry weight highly and positively affects tolerance to salinity. The results also indicated that the relative tolerance to salinity was highest in Tabasi and Sholeh while lowest in Atrak and Ghods cultivars. There were some other cultivars, though not known as tolerant, that showed relative tolerance to salinity regarding either one or both the grain and shoot growth rates (e.g. Bessotoon). It was also observed that leaf bum, specially at 98 days after sowing can be considered as a fast visual indicator of salt tolerance in wheat cultivars.
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
33
v.
1
no.
2002
https://jijas.ut.ac.ir/article_10947_5669a7f82f208fce426ce33dacf822e4.pdf
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شکوفه
انتشاری
author
خسرو منوچهری
کلانتری
author
text
article
2002
per
The effect of ethylene on plant growth and development had been known long before. This gas used as plant growth regulators. Application of this hormone in many stages of plant growth and development specified the importance of these hormones. The aim of this studies was to investigate the role of this hormone in plant which were under water shortage. Water stress caused significant differences in soil water potential. 6 days after ceasing irrigation the soil water potential dropted from 5 to 1] Bar. During this time the water contents of soil on the bases of dry weight decreased from 55 to 18 percent. Which indicate relatively high stress. To investigate how water stress function on morphology and organogenesis of plants, the internode number were counted. Internode number did not changed during stress in comparison to control plants, which showed water stress did not effect on leaf initiation but internode length were significantly reduces. Water potential highly decreased during stress and plants which were under stress up to 6 days had a water. Potential equal to 13 Bar which is relatively high stress. Total leaf area of Plants were measured. 4 days after ceasing irrigation significant decrease in total leaf area were observed. Stomata conductance significantly decrease 3 days after stress. (from If4 to 1 scm-I). 6 days after water stress treatment conductance further decrease to 0/2 scm,l. Ethylene production increased significantly when leaf water potential droped up to - 5 Bar and thereafter the amount of ethylene emanation significantly decreased. When the experiment were carried with excised leaf which were left under room temperature till leaf which were left under room temperature till leaf water potential droped to the same water potential of intact droped to the same water potential of intact plant. We observed correlation
between ethylene production and water stress. After irrigation of Plants which were stress, leaf
absiction correlation with the days which plants were under stress. In Plants which were 5 days under water stress 100 percent leaf absicion were observed. After irrigation to the lack of correlation between stress and ethylene production in more common method we try to test and compare intact flow system method with the mentioned method and the result were discussed.
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
33
v.
1
no.
2002
https://jijas.ut.ac.ir/article_10948_494565bc53a0d6be22b9b383b20eed82.pdf
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سید حسین میر
دهقان
author
مجید
راحمی
author
text
article
2002
per
In this experiment, pomegranate fruits of cultivars 'Malas Yazdi' and 'Malas Saveh' were harvested from the orchard of Yazd Research Experiment Station in 1997, and after grading, they were stored at 1 SC and %85:i:3 relative humidity (RH) for a period of 4 months. They were removed in an every 0 (Control), 2, 4 and 6 weeks intervals from the storage, kept at 25°C for 12 hr and returned to the cold storage. Results showed that intennittent warming for every 4 and 6 weeks during cold storage significantly reduced chilling injury, pH, fruit decay and increased total acidity, however it had no significant effects on electrolyte leakage, total soluble solids and ascorbic acid of fruit after removal :trom storage. Heating every 2 weeks increased electrolyte leakage and significantly decreased fruit decay.
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
33
v.
1
no.
2002
https://jijas.ut.ac.ir/article_10949_83afb0c61a1a129c2d55bd390d4f9fb2.pdf
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غلامحسین
زمانی
author
text
article
2002
per
One of the major incentives for pursuing education at college level is to receive a degree hoping for a better job after graduation. In this regard, universities try to provide best environment for students' development. Follow-up studies show college students worry about their future jobs seriously. Since this situation affects students' performance and educational achievements, this research study was contemplated and conducted. This descriptive research administrated a valid and reliable questionnaire on 234 agricultural students who entered Shiraz University in 1376 (1997). To analyze the students' decision-making process towards future job preferences the expectancy theory was applied. The results show that most students' parents are members of staff at some organization - possessing no agricultural land and/or required capital to support and involve their graduate children in private business. The students' positive attitudes toward agriculture have been increased with the start of their college studies. They prefer research, and agricultural production as their future career choices. But, considering possibility factors (expectancy theory) agricultural production and white collar occupations (government staff) are most probable as agricultural college student's future jobs.
Key words: , , ,
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
33
v.
1
no.
2002
https://jijas.ut.ac.ir/article_10950_0e7ddd69404e43facb1da45461573ed6.pdf
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فهیمه شاهین
نیا
author
عبدالمجید
رضایی
author
text
article
2002
per
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
33
v.
1
no.
2002
https://jijas.ut.ac.ir/article_10951_ff03684345b840b11a13905f8bceda02.pdf
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سیده ساناز
رمضانپور
author
عبداهادی حسین
زاده
author
حسن
زینالی
author
موسی الرضا وفایی
تبار
author
text
article
2002
per
Genetic variability, association between agronomic and morphological traits and seed cotton yield as well as its components were studied in 56 glandless cotton varieties using a rectangular lattice design with three replications. These varieties were planted in the field, Cotton Research Institute of Varamin in 1999. Stepwise regression showed that, seed number / boll, 50% span length, plant height, lint strength, seed index and lint resistance could explain variations in yield (R2=0.4774). Path analysis showed that internode length, boll weigth, plant height and sympodia number had the highest direct effects on yield/ plant. Due to their high direct and or indirect effects on yield, internode length, boll weight and boll/plant can be used as selection criteria to identifY the high yielding genotypes. Factor analysis introduced 6 factors among 30 variables which explain 63.2% of total variance and included seed characteristics, plant morphological characteristics, yield and its components, maturity, lint length and lint yield. Cluster analysis using Ward method, based on Euclidean distance of 8.5 grouped the varieties into five clusters. The varieties in group 4, from the viewpoint of the height of 151 sympodia, monopodia number and node number to 1st sympodia, was the earliest maturity group and second group because of having high quantitative and qualitative seed and lint yield was distinguished as the best group.
Key words: , , , Multivariate statistical
methods.
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
33
v.
1
no.
2002
https://jijas.ut.ac.ir/article_10952_2a2eb85bcba47065c3a715574e5caaba.pdf
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مجید
سلیمانی
author
محمد
شاهدی
author
محمد هادی خوش
تقاضا
author
text
article
2002
per
Determination of head rice yield (HRY) is of paramount importance in rice production. HRY is determined by a weight ratio of whole rice kernel to milled rough rice. Normally the experimental method for measuring HRY is sensitive, expensive and time consuming. The purpose of this study was to investigate the viability of using fissuring and bending strength of rough rice to determine the HRY. Different treatments of drying process were used to prepare the samples with different fissures and bending strengths. The results showed that the bending strength of the samples decreased by an increase in the percentage of grain fissures, leading to a decrease in HRY. High correlations (R=-0.98) were observed between head rice yield and bending strength and also between the percentage of grain fissures and HRY (R= 0.92). Head rice yield regression models were found with respect to fissuring and bending strengths. To estimate the head rice yield on the basis of "percent fissured grains" was finally recommended, due to its simplicity, lower cost and high precision.
Key words: , , , .
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
33
v.
1
no.
2002
https://jijas.ut.ac.ir/article_10953_8d04cc2703a60643594def76c432f117.pdf
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جعفر صادق کریمی
ایروانلو
author
کریم
کمالی
author
علی اصغر
طالبی
author
text
article
2002
per
The larva of Iraniella moharramipuri, gen. nov., sp. novo (Acari: Erythraeidae) ectoparasitic on a short - horned grasshopper, Oedipoda miniata Pall. (Orthoptera: Acrididae) is described from Varamin, Iran. It belongs to subfamily Callidosomatinae, similar to genera Hauptmannia Oudemans, Harpagella Southcott, Pussardia Southcott, Grandjeanella Southcott and Abrolophus in having (2+2) scutalae. Iraniella moharramipouri gen. nov., sp. novo differs from the above mentioned genera in the shape of scutum. In Iraniella moharramipouri gen. nov., sp. novo scutum is somewhat pentagonal and hind pairs of sensillae are set on tubercles on the hind margin of scutum. In genus Iraniella anterior sensilla are set with Al setae in a row; coxal setal formula is 1, 2, 2; trochanteral setal formula is 1, 1, 1.
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
33
v.
1
no.
2002
https://jijas.ut.ac.ir/article_10954_f030f6c87c03050a9b5ee93d0a5289e9.pdf
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علی
عبادی
author
حسن ساری
خانی
author
ذبیح اله
زمانی
author
مصباح
بابالار
author
text
article
2002
per
Breeding program in grapevine to find new superior seedless cultivars is one of the most important priorities in table grape industry. Among different techniques, in-ovule embryo culture has obtained a high importance due to its great potential in hybridization of seedless grapevine cultivars followed by a rescue of the resulting embryo before it gets degenerated. In this work, the technique was applied in the case of five Iranian seedless cvs (White Seedless, Red Seedless, Yaghooti, Green Keshmeshi and Askary)
and a new recently imported. One, namely Flame Seedless. Ovules were dissected out of berries at 20, 30, 40, 50 and 60 days after flower opening and then cultured in Nitsch & Nitsch medium containing 111M GA3, 10 11M IAA, 2 g/I activated charcoal, 2% (w/v)sucrose and 0.8% (w/v) agar. Embryo rescue and its germination were carried out successfully in most of the cultivars. Results showed that culturing of ovules at 20 days after flower opening in cvs White Seedless, and Red Seedless and 40 days after flower opening in cvs Flame Seedless, Yaghooti and Askary were the most convenient to rescue the embryos. The highest success rate was obtained in cv. Flame Seedless (10.2%), while it was too low in cv. Red Seedless (0.97%).
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
33
v.
1
no.
2002
https://jijas.ut.ac.ir/article_10955_b30637d8dda10517bbc06b22efd424e7.pdf
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ابراهیم
زینلی
author
افشین
سلطانی
author
سراله
گالشی
author
text
article
2002
per
Germination rate (FGP) ,final germination persentage (FGP) , germination uniformity (GU) and heterotrophic seedling growth are important components in the germination process in crops. It is likly that sensitivity of these components varies according to environmental stresses, including salinity. Furthermore, for breeding purposes and in order to increase salinity resistance in gremination stage, knowledge of relative sensitivity of germination components as wall as identification of the most sensitive component is necessary. Hence, this study was conducted to examine the responses and relative sensitivity of germination componets of oilseed rape (Brassica napus L.) to salinity. The experiment was conducted in petri-dishes using a factorial arrangment in a completely randomized design with 5 replications. Experimental factors were NaCI salinity at three levels (0, -0.4 and -0.8 MPa) and a number of five oilseed rape cultivars (Talaie, Ceres, Regent, Cobrax W. A and PF 7045.91). Results showed that salinity has a significant effect on Gr, GO, FGP as well as seedling length and root / shoot ratio (R: S), but these components were affected by varying degrees. FGP and GR were the most tolerant and sensitive components, respectively. Root growth was more sensitive than shoot growth. Also, significant cultivars x salinity interactions were found for GR, FGP and GO, but not in the case of seedling growth. In control, the highest GR (0.58) was
observed for Ceres, while the lowest decrease in GR, relative to control (19.6%), in high salinity treatment (-0.8 MPa) was observed for Regent. The lowest decline in GR
relative to control in medium salinity (-0.4 MPa) was observed for the case of PF 7045.91.
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
33
v.
1
no.
2002
https://jijas.ut.ac.ir/article_10956_946eb94af55da4a39b04d3aae45306f4.pdf
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محمدرضا فتاحی
مقدم
author
علی
عبادی
author
محمدضا
قنادها
author
علی
وزوایی
author
text
article
2002
per
An evaluation of ninety cultivars of grapevine selected from vines in Grapvine Collection of Horticultural Research Center, Agricultural Faculty of Tehran University was carried out at the center. Vines were planted in a density of 2 meters between any two consecutive vines in row and 3 meter spacing between rows, using cordon trellising system. Vines were spur pruned. The experiment was conducted in a complete randomized block design with 3 replications, each replication consisting of one vine plot, two samples in each vine. Some quantitative and qualitative characters (bunch weight, bunch number per vine, bunch size, berry weight, berry number, berry size, seed number, seed weight per berry, total soluble solids, acid content and...) were evaluated.
The results of phenotypic correlation, multiple regression and path analysis for yield of vine, bunch and berry showed that bunch number per vine, bunch weight, berry number and berry weight characters have the greatest effect on vine yield. Some characters such as bunch size, berry weight, berry number and bunch length have the greatest effect on bunch yield. On the other hand, the traits of length, width and berry size, along with number of seeds per berry have a conspicuous effect on berry yield.
Key words: , , Path analysis, Yield.
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
33
v.
1
no.
2002
https://jijas.ut.ac.ir/article_10957_41d69827e6c9265c6e4b1d02d33847d5.pdf
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علیرضا
نیکویی
author
جواد
ترکمانی
author
text
article
2002
per
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
33
v.
1
no.
2002
https://jijas.ut.ac.ir/article_10958_df65d18b1d7f437e020bd8451a2dbcb9.pdf
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علیرضا
طلائی
author
یونس
ابراهیمی
author
علی
وزوائی
author
text
article
2002
per
This research was conducted to investigate the effects of pollen of nine citrus cultivars on the quantitative and qualitative characteristics of Page mandarin. To carry out and for analyzing the results of the research, a Randomized complete Block Design with three replications was implemented for a period of two years, (1997, 1998). After
artificial pollination, data were recorded and the fruits were harvested at a ripe stage. Factors such as weight, diameter, length, volume, peel thickness, juice content, developed and undeveloped seeds, total soluble solids, total acid, vitamin C and
percentage of final fruit set were measured. The results indicated that the pollen of
Siavaraz local sweet orange, had the highest effect on the percentage of final fruit set and pollen of Shel - Mo - Haleh (natural hybrid) and Hamlin orange had the highest effect on the quantitative and qualitative characteristics of the fruit respectively. It was concluded that the pollen of Hamlin orange had the best effect on the quantitative and qualitative characteristics of Page mandarin
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
33
v.
1
no.
2002
https://jijas.ut.ac.ir/article_10959_0d47f67800b33b7adeb78813169d5155.pdf
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حمید ایران
نژاد
author
محمدرضا
قنادها
author
علیرضا نژاد محمد
نامقی
author
text
article
2002
per
Different investigators have reported the usage of mulches for increasing yield in arid and semi - arid lands. Mulches used on soil surface for decreasing evaporation improve water penetration, erosion control, management of salty and semi - salty water, weed control, soil structure improvement, etc. Aim and local conditions determine the kind of mulching material. In this research, different chemical mulches (MI), manure (M2), residue (M3) and Polyethylene (M4) were used. The effect of these materials on seed cotton germination, biomass dry matter and yield of cotton (Varamin variety) as compared to control (Mo no mulch) was tested on a farm in Kashan. A randomized complete block design with 3 replications was used for biomass dry matter evaluation and for yield, assessment, a number of four replications, along with 7 and 14 days irrigation periods were employed. Germination rates for Mo, MI, M2, M3 and M4 treatments were 64, 65, 76, 57 and 72 respectively. Biomasses dry matter for Mo, MI, M2, M3 and M4 were respectively 276, 306, 426, 403, and 476 grlpot. M4 treatment (Polyethylene mulch) exhibited the most effect. There were no significant differences observed between M2 and M3 and Mo and M1 treatments. Yield mean at 7 day irrigation period for Mo, MI, M2, M3 and M4 were 700, 725, 857, 1057 and 1273 grlpot respectively. M3 exhibited the most effect with no significant difference among all treatments. Yield mean at 14 days of irrigation period for Mo, MI, M2, M3 and M4 were 535, 507, 690, 957 and 1047 grl pot respectively. There were significant differences observed between all treatments and control. Results showed that different mulches not only decrease water consumption but also meaningfully increase yield in arid and semi - arid regions.
Key words: , ,, , ,
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
33
v.
1
no.
2002
https://jijas.ut.ac.ir/article_10960_d16701eae50a6703bfc55f34d6fd3602.pdf
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محمد زارع
ارنانی
author
سعید
اسلامیان
author
text
article
2002
per
Precipitation is measured throughout the world at discrete points. Thus, to obtain volumetric values requires interpolation and integration over areas. This is termed as: Depth - Area - Duration. These relations are important to water resource designers and are still in use today as they can be applied to readily available data. The study area is Yazd - Ardekan plain. Data used for the estimation of Depth - Area - Duration were as follows: (l) Precipitation - monthly, daily and hourly (2) Topographic information (3) Weather maps and upper atmosphere data (4) Storm data. Depth - Area- Duration relationships were obtained through a statistical analysis of the largest record of precipitation in the region (30 years of daily rainfall at dense networks of rain gauges in Yazd province). Precipitation Depth - Area - Duration relationships were derived for 24, 48, 72 and 96 hours. The resulting average rainfall depth may then be used as input data to various models or formulas to make run - off calculations.
Iranian Journal of Agriculture Science
پرديس کشاورزي و منابع طبيعي دانشگاه تهران
33
v.
1
no.
2002
https://jijas.ut.ac.ir/article_10961_4e42b1dcc52ad9cd0021ecdeec3535c5.pdf