analysis of monthly wet and dry spell occurrence by using power laws in golestan province, iran

Authors

رئوف مصطفی زاده

استادیار گروه مرتع و آبخیزداری، دانشکدۀ کشاورزی و منابع طبیعی، دانشگاه محقق اردبیلی مهدی وفاخواه

دانشیار گروه مهندسی آبخیزداری، دانشکدۀ منابع طبیعی، دانشگاه تربیت مدرس محسن ذبیحی

دانشجوی دکتری علوم و مهندسی آبخیزداری، باشگاه پژوهشگران جوان و نخبگان دانشگاه آزاد اسلامی واحد بجنورد

abstract

the wet and dry spells can be defined as a number of consecutive months with rain amount greater or less than the truncation level, respectively.analysis of the wet and dry spell properties of monthly rainfall series at 40 meteorology stations in the golestan province is carried out for an extended period of 34 years (1974–2007). the results proved that the patterns of wet and dry spell durations can be determined using power law technique. wet and dry spell duration characteristics, as well as the frequency of dry spells for the length of (1-9 months) are discussed. the longest dry spells are identified in north-east of the golestan province in tamar and minudasht stations with 5 and 6 times occurrence respectively. whereas longest wet spell with the 9 months length is shown over the central part of the study area. it has been observed that the longest durations of dry periods occur in the stations that located in the northern part of the golestan province. the interpretations of double logarithmic plots of (frequency versus length period) can be used to compare the occurrence patterns of wet and dry spells in the stations over different precipitation regimes. further applications of power law method are suggested to obtain a better understanding for the interpretation of wet and dry spells regions with different climatic conditions.

Upgrade to premium to download articles

Sign up to access the full text

Already have an account?login

similar resources

Determining the variations of monthly wet and dry regimes using Angot index in Ardabil Province

Drought is the main causes of significant water imbalance, increase of crop losses or limitation in water consumption, and finally large number of socioeconomic and environmental problems. Precipitation amount is the most important climatic variables that its spatiotemporal variability has a great influence on water resources availability along with the effects of climate change. The Angot inde...

full text

Spatial and Temporal Displacements in Wet and Dry Periods in the Southeast of the Caspian Sea: Golestan Province in Iran

The global warming phenomenon has had a great impact not only on the temperature patterns of the regions, but also on the spatial-temporal patterns of the occurrence of wet and dry days. As some areas have increased (decreased) the number of dry days, the result of these changes requires new approaches to water management in these areas. Golestan province in northern Iran is one of the province...

full text

analysis of power in the network society

اندیشمندان و صاحب نظران علوم اجتماعی بر این باورند که مرحله تازه ای در تاریخ جوامع بشری اغاز شده است. ویژگیهای این جامعه نو را می توان پدیده هایی از جمله اقتصاد اطلاعاتی جهانی ، هندسه متغیر شبکه ای، فرهنگ مجاز واقعی ، توسعه حیرت انگیز فناوری های دیجیتال، خدمات پیوسته و نیز فشردگی زمان و مکان برشمرد. از سوی دیگر قدرت به عنوان موضوع اصلی علم سیاست جایگاه مهمی در روابط انسانی دارد، قدرت و بازتولید...

15 صفحه اول

Silica and Esophageal Cancer in Golestan Province Northeast of Iran

Objectives: Association of silica with diseases like cancers has been determined previously. This study was designed to determine the quantity of silis in flour produced in Golestan province and its relation to the esophageal cancer. Methodology: We took flour samples from all flour mills in Golestan province. Base-melting method in nickel cruise was used in 550°c; the extract was reduced with ...

full text

Incidence of Childhood Cancers in Golestan Province of Iran

OBJECTIVE This paper presents the incidence rates of childhood cancers using the data obtained from Golestan population based cancer registry (GPCR) between 2004 and 2006. METHODS GPCR registers only primary cancers based on standard protocols of the international association of cancer registries (IACR). We collect data on newly diagnosed (incident) cancer cases from all public and private di...

full text

Male skin cancer incidence in Golestan province, Iran.

OBJECTIVE To evaluate province-specific estimates of incidence in males by age groups for skin cancer in the Golestan province, Iran. METHODS Data was collected from a cancer registry that was conducted by Health Deputy of Golestan province for a period of one year (2004). Age-specific rate and age-standardized incidence rate (ASR) were determined. Age-specific rate and age-standardized incid...

full text

My Resources

Save resource for easier access later


Journal title:
اکو هیدرولوژی

جلد ۲، شماره ۴، صفحات ۴۲۹-۴۴۳

Hosted on Doprax cloud platform doprax.com

copyright © 2015-2023