Hydrological Drought Assessment and Analysis of its Characteristic Using the Stream flow Drought Index (SDI) at Hydrometry Stations in the Province of Ardabil

Message:
Article Type:
Research/Original Article (دارای رتبه معتبر)
Abstract:

Hydrological drought can lead to a decrease in river flow and loss of the river ecosystem quality, which limits human use of the surface water. The stream flow drought index (SDI) has been used to assess the hydrological droughts in 33 hydrometric stations of the Province of Ardabil. The SDI was calculated using the DrinC software; subsequently, characteristics of the hydrological drought were classified and analyzed. The inter-relationship of the different components of hydrological drought with those of the flow rate were also examined. Subsequently, some of the hydrological drought characteristics were interpolated to detect the spatial variations. The results indicated that all of the studied stations experienced drought events. The maximum dry-period was 62 months at the Samian Station. The results of the standard classification of the SDI in 14 stations (Aladizge, Pole-Almas, Anbaran, Baroogh, Boran, Dostbeyglu, Gilandeh, Iril, Koozetopraghi, Mashiran, Neour, Samian, Shamsabad and Sola) indicated that the number of wet-months were larger than that of the dry-months. The severest drought was observed at the Pole-Almas Station (-1.05), while the highest frequency of wet-months had been recorded at the same station. The average intensity of the highest and lowest hydrological drought events at the Pole-Almas and Anbaran Stations were -1.05 and -0.57, respectively. The spatial variations of drought occurrence showed that the stations located in the upstream areas and the Sabalan piedmonts had the lowest drought occurrence in the study area. The severe and severest drought events had been occurred in small rivers with low discharge.

Language:
Persian
Published:
Whatershed Management Research, Volume:32 Issue: 124, 2019
Pages:
21 to 36
https://www.magiran.com/p2049343  
سامانه نویسندگان
  • Amini، Hamed
    Author (1)
    Amini, Hamed
    Phd Student watershed managment, warershed engineering, tarbiat modares university, Tarbiat Modares University, Tehran, Iran
  • Esmali Ouri، Abazar
    Author (2)
    Esmali Ouri, Abazar
    Professor Department of Range and Watershed Management, University of Mohaghegh Ardabili, Ardabil, Iran
  • Mostafazadeh، Raoof
    Corresponding Author (3)
    Mostafazadeh, Raoof
    Associate Professor Natural Resources, Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabili, Ardabil, Iran
  • Zabihi، Mohsen
    Author (5)
    Zabihi, Mohsen
    (1399) دکتری علوم و مهندسی آبخیزداری، دانشگاه تربیت مدرس
اطلاعات نویسنده(گان) توسط ایشان ثبت و تکمیل شده‌است. برای مشاهده مشخصات و فهرست همه مطالب، صفحه رزومه را ببینید.
مقالات دیگری از این نویسنده (گان)