干旱区生态环境知识资源中心(Arid): Assessment of groundwater depletion in a heterogeneous aquifer: historical reconnaissance and current situation

Arid

DOI	10.1007/s12665-021-09839-5
	Assessment of groundwater depletion in a heterogeneous aquifer: historical reconnaissance and current situation
	Dehghani, Fateme; Mohammadi, Zargham; Zare, Mohammad
通讯作者	Mohammadi, Z (corresponding author), Shiraz Univ, Dept Earth Sci, Fac Sci, Shiraz 7136713565, Iran.
来源期刊	ENVIRONMENTAL EARTH SCIENCES
ISSN	1866-6280
EISSN	1866-6299
出版年	2021
卷号	80 期号:17
英文摘要	Groundwater depletion has appeared as a main socio-ecological challenge in the arid and semi-arid conditions such as Iran during the last decades. This study attempts to evaluate long-term spatiotemporal variations of water table in the Bieza alluvial aquifer in southern Iran (from 1973 to 2018). A hydrogeological conceptual model was developed to elucidate the spatiotemporal groundwater depletion, factors influencing the irregular decline of the water table and deterioration of groundwater quality in the study area. The conceptual model was developed based on the physical structures (e.g., well logs and geological evidence) as well as hydrological processes taken place during the studied period (e.g., spatiotemporal variation of water table). Although, the aquifer is known as an unconfined aquifer, the results revealed it partly functioned as a confined aquifer due to the complex and heterogeneous sequence of a wide range of sizes and types of deposits ranging from clay to boulder sizes. Four different hydrogeological units, HU, are introduced to explain the spatial heterogeneity of the aquifer (i.e., the particle size of the deposits is gradually increased for HU1-HU4). Comparing hydrogeological characteristics in the different geological cross sections elucidated that the recharge zone is mainly comprised with the HU3 and HU4, while, HU1 and HU2 are widely distributed in the intermediate and discharge zones of the aquifer. There were three wetlands in the area (e.g., Banish, Negarestan and Malusjan wetlands) that were active before 2006. Results revealed that in consequence of the complete drying of the three wetlands, groundwater flow direction has been reversed and the groundwater divide line has been relocated to adjust the new condition of the groundwater system which is affected by the considerable depletion of groundwater level. Spatial heterogeneity of the aquifer caused unequal groundwater level decline from a few to more than 40 m in the discharge and recharge zones, respectively. Multi-regression analysis elucidated that the groundwater level in the Bieza aquifer has been reduced in response to decreasing recharge rate due to the experienced drought periods as well as over-exploitation of the aquifer. As a consequence, the quality of groundwater is broadly lessened. Assuming the zero water-level change method, annual safe yield (value of 23.7 Mm(3)) is determined as a sustainable strategy for groundwater exploitation in the study area.
英文关键词	Hydrogeology Groundwater depletion Conceptual model Groundwater divide line
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000686634600010
WOS关键词	GRACE
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368490
作者单位	[Dehghani, Fateme; Mohammadi, Zargham; Zare, Mohammad] Shiraz Univ, Dept Earth Sci, Fac Sci, Shiraz 7136713565, Iran
推荐引用方式 GB/T 7714	Dehghani, Fateme,Mohammadi, Zargham,Zare, Mohammad. Assessment of groundwater depletion in a heterogeneous aquifer: historical reconnaissance and current situation[J],2021,80(17).
APA	Dehghani, Fateme,Mohammadi, Zargham,&Zare, Mohammad.(2021).Assessment of groundwater depletion in a heterogeneous aquifer: historical reconnaissance and current situation.ENVIRONMENTAL EARTH SCIENCES,80(17).
MLA	Dehghani, Fateme,et al."Assessment of groundwater depletion in a heterogeneous aquifer: historical reconnaissance and current situation".ENVIRONMENTAL EARTH SCIENCES 80.17(2021).