Zahra Abdollahi

Soil Conservation and Watershed Management Research

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Behzad Shokati

Islamic Azad University, Tehran

Abdulvahed Khaledi Darvishan

Tarbiat Modares University

Seyed Hamidreza Sadeghi

Tarbiat Modares University

Bakhtiar Feizizadeh

University of Tabriz

Ataollah Kavian

Sari Agricultural Sciences and Natural Resources University

Seyed Hamid Reza Sadeghi

Tarbiat Modares University

Alla Khosrovyan

National Institute of Chemical Physics and Biophysics

T.Á. DelValls

Universidade Santa Cecília

Gianluigi Busico

University of Campania "Luigi Vanvitelli"

Moghadaseh Fallah

Sari Agricultural Sciences and Natural Resources University

Cooperative Institutions

Watershed

Tarbiat Modares University

Sari Agricultural Sciences and Natural Resources University

Sapienza University of Rome

Universidad de Cádiz

Soil Conservation and Watershed Management Research

University of Montenegro

Iran Meteorological Organization

Universidade Federal de Alfenas

Urmia University

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Simulated raindrop's characteristic measurements. A new approach of image processing tested under laboratory rainfall simulation

CATENA (2018)

Ataollah Kavian Maziar Mohammadi Artemi Cerdà Moghadaseh Fallah Zahra Abdollahi

10.1016/j.catena.2018.04.034

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Citations (34)

Simulating the effects of retreating Urmia Lake and increased evapotranspiration rates on the nearby unconfined aquifer

Groundwater for Sustainable Development (2024)

Zahra Abdollahi Bakhtiar Feizizadeh Behzad Shokati Mattia Gaiolini Gianluigi Busico

The unsustainable management of water resources along with climate change impacts have led Urmia Lake to severely shrink since 1995. To quantify the groundwater losses in the surrounding area and to avoid the future worsening of a yet worrying scenario a numerical model is needed. For this purpose, a transient state MODFLOW model (2000–2016) has been calibrated and validated versus hydraulic heads. Good model performances were obtained, allowing to accurately estimate the groundwater budget. MODIS dataset was employed to set up the numerical model to identify temporal and spatial extent of evapotranspiration. Evapotranspiration turned out to play a massive contribution in groundwater outflow showing an increasing trend over time. Several scenarios, considering a different way to implement recharge and evapotranspiration in the modelling routine were assessed. The role of the spatialization of the evapotranspiration extinction depth was investigated by averaging remotely sensed heterogeneous datasets over the model domain. No significant differences in model performance indicators were found. Moreover, a model scenario without human groundwater exploitation and land use change was considered. The results slightly differ from the groundwater budget calculated by the validated model and thus indicating the climate change as the major driver of groundwater depletion in the study area. The implementation of such a model allowed for the assessment of the exchange between the lake and the unconfined aquifer, providing a robust foundation for future sustainable management.

MODFLOW

Groundwater model

10.1016/j.gsd.2024.101307

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Citations (0)

Identifying environmental risk associated with anthropogenic activities in Zanjanrud River, Iran, using an integrated approach

CATENA (2019)

Zahra Abdollahi Ataollah Kavian Seyed Hamid Reza Sadeghi Alla Khosrovyan T.Á. DelValls

Turbidity

10.1016/j.catena.2019.104156

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Citations (11)

Detailed procedure for outdoor measurement of raindrop size distribution using photogrammetry

Journal of Hydrology and Hydromechanics (2021)

Zahra Abdollahi Seyed Hamidreza Sadeghi Abdulvahed Khaledi Darvishan

Abstract Kinetic energy and corresponding erosive force of rainfall are strongly influenced by raindrop. The present paper aims to explore the raindrop size variation during rainfall events with different intensities in northern Iran by applying the processes of camera-taken photographs. Five rainfall intensities of 1 to 10 mm h –1 that occur frequently in the study area were analyzed. A camera with a very short exposure time was used to record the distribution of raindrops size. The raindrops diameters of the rain events ranged from <0.2 to 5.1 mm while the majority of them were between 1 and 2 mm. The results also showed that the variation of rainfall intensity significantly influenced (P< 0.05) raindrops size. Image processing was proven as an accurate technique of translation between the human visual system and digital imaging devices. The findings of the study can be practically utilized by researchers who work in the field of soil erosion and meteorology.

Digital camera

Intensity

Variation (astronomy)

10.2478/johh-2021-0007

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Citations (6)

A GIS-Based Spatiotemporal Impact Assessment of Droughts in the Hyper-Saline Urmia Lake Basin on the Hydro-Geochemical Quality of Nearby Aquifers

Remote Sensing (2022)

Bakhtiar Feizizadeh Zahra Abdollahi Behzad Shokati

Urmia Lake is a hyper-saline lake in northwestern Iran that has been drying up since 2005. The main objective of this study was to evaluate the water quality in aquifers that are the main source of fresh water for the eastern plains Urmia Lake, which has been drying up due to intensive land use/cover changes and climate change. We evaluated hydro-geochemical data and factors contributing to aquifer pollution and quality variation for nine aquifers in the vicinity of Urmia Lake during the dry and wet seasons from 2000–2020. Our methodology was based on the analysis of 10 years of data from 356 deep and semi-deep wells using GIS spatial analysis, multivariate statistical analysis, and agglomerative hierarchical clustering. We developed a Water Quality Index (WQI) for spatiotemporal assessment of the status of the aquifers. In doing so, we highlighted the value of combining Principal Component Analysis (PCA), WQI, and GIS to determine the hydro-geochemical attributes of the aquifers. We found that the groundwater in central parts of the study area was unsuitable for potable supplies. Anthropogenic sources of contamination, such as chemical fertilizers, industrial waste, and untreated sewage water, might be the key factors causing excessive concentrations of contaminants affecting the water quality. The PCA results showed that over 80% of the total variance could be attributed to two principal factors for most aquifers and three principal factors for two of the aquifers. We employed GIS-based spatial analysis to map groundwater quality in the study area. Based on the WQI values, approximately 48% of groundwater samples were identified as poor to unsuitable for drinking purposes. Results of this study provide a better hydro-geochemical understanding of the multiple aquifers that require preventive action against groundwater damage. We conclude that the combined approach of using a multivariate statistical technique and spatial analysis is effective for determining the factors controlling groundwater quality.

10.3390/rs14112516

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Citations (9)

Experimental comparison of some techniques for estimating natural raindrop size distribution on the south coast of the Caspian Sea, Iran

Hydrological Sciences Journal (2013)

Seyed Hamidreza Sadeghi Zahra Abdollahi Abdulvahed Khaledi Darvishan

Knowledge of the relationship between rainfall intensity and kinetic energy and its variations in time and space is important for the prediction of erosion hazard. Kinetic energy and erosivity are also strongly controlled by raindrop size. However, studies on raindrop measurement and different practical techniques have been rarely documented. The current study therefore aimed to apply existing raindrop-size measurement techniques—the photographic, flour-pellet and stain methods, as well as an innovative flour-stain method—and to evaluate their applicability at several intensities in Mazandaran Province, Iran. The distribution of raindrop size obtained by the different methods was recorded and compared with those obtained through applying a high-speed imaging technique. All the analyses were made with the help of a SPSS software package. The results showed that the raindrop diameters ranged from 0.2 to 5.16 mm at different rainfall intensities. Statistical comparison of the methods using the Duncan test showed that the flour-pellet method presented similar results to the photographic technique; it was concluded that this can be used as a practical and inexpensive method to estimate a wide range of raindrop sizes.Editor Z.W. KundzewiczCitation Sadeghi, S.H., Abdollahi, Z., and Khaledi Darvishan, A., 2013. Experimental comparison of some techniques for estimating natural raindrop size distribution on the south coast of the Caspian Sea, Iran. Hydrological Sciences Journal, 58 (6), 1374–1382.

10.1080/02626667.2013.814917

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Citations (30)