Effect of watershed dam on groundwater level (Lavar earth dam)
نویسندگان
چکیده مقاله:
The managed recharge of groundwater is a stable and newfound technique which has already produced successful results and is expected to solve many of the problems of water resources, particularly in arid and semiarid areas. Artificial recharge of aquifers is considered as a strategy for the improvement of groundwater resources and their storage capacity to compensate for the damages inflicted on them. In Iran, funds are annually allocated to artificial recharge projects. Assessing the effects of these projects on aquifers is important, since positive results can expand the implementation of these projects. This investigation was carried out in the Lavar-e- Fin plains. The aim of this study was to evaluate the effects of a dam on groundwater. We estimated groundwater level before and after construction of an earthen dam. We used library data, data collected by the Ministry of Energy and information recorded during fieldwork. We used water level data from 6 piezometric wells drilled by Regional Water Company of Hormozgan Province and monthly precipitation data during the period from 1995 to 2015. All piezometric wells were located downstream of the dam. The effect of the earthen dam on groundwater level changes were analyzed over a 20-year period and for before and after construction of the dam. The general trend of groundwater level and water level changes in each piezometer well was descending, despite the positive influence of the earthen dam. The results showed that the dam lowered the rate of water level drop. The average precipitation in the 9 years prior to the construction of the dam was 182 mm, while the average rainfall in the next 11 years was 155 mm. In general, the results of this study showed that in spite of the recent droughts and increased uptake of groundwater, Laver dam has had a positive effect on the water level of the aquifer. Although the dam has not been able to compensate for all the losses due to overharvesting, it has reduced the severity of the decline to a large extent.
منابع مشابه
Source Fingerprinting of Sediment Deposited in the Dam Reservoir: A Case of Lavar Dam Watershed, Fin, Hormozgan Province
Extended abstract 1. Introduction Soil erosion is a major environmental threat worldwide. This three-stage process including detachment, transportation and sedimentation of soil particle by runoff affects natural and agricultural areas of Iran. Soil erosion has many off-site and on-site effects such as sediment deposition in the lake of dam and channels, transportation of nutrients and contam...
متن کاملObservation on ornithofauna of Kocaeli-Yuvacik dam watershed in Turkey.
The objective of this study was to determine the bird species in the Yuvacik Dam watershed in the province of Kocaeli. The total area of the study site was 25800 ha, and was subdivided to 60 plots (the size of each plot, 2x2 km). Observations and inventory for each species were carried out. A total of 130 species belonging to 38 genus of 16 orders were identified. Eighty-seven were classified a...
متن کاملThe Effect of Cut-off Wall on Seepage and Uplift Pressure under Earth Dam (Case Study: Shamil Dam in Iran)
Design of earth dams and their problems are important during construction and after it,because of their potential hazards and failure for downstream population. The dam foundation seepage control the the importance from the perspective of a major engineering project and explain the economic performance of each project is allocated. among activities that can be used to prevent piping phenomena a...
متن کاملEvaluation of Earth Dam Behavior against Earthquake with respect to Dam Height and Constitutive Model of Dam Materials
In spite of the fact that the effect of earthquake on earth dams has been widely studied during the past decades, the complicated behavior of such earth structures against different seismological characteristics is still unknown. Such ambiguities necessitate more accurate studies using more comprehensive computation tools to achieve new results describing the behavior of such structures subject...
متن کاملEvaluation of Earth Dam Behavior against Earthquake with respect to Dam Height and Constitutive Model of Dam Materials
In spite of the fact that the effect of earthquake on earth dams has been widely studied during the past decades, the complicated behavior of such earth structures against different seismological characteristics is still unknown. Such ambiguities necessitate more accurate studies using more comprehensive computation tools to achieve new results describing the behavior of such structures subject...
متن کاملEffect of dam methylation on Tn5 transposition.
The effect of dam methylation on Tn5 transposition was investigated by analyses of mutations in the host (Escherichia coli) and the element. Wild-type elements transposed at a higher frequency and showed higher levels of transposase expression in a dam-host. Mutations were made in the promoter region of the transcript that codes for the transposase. Transposition and transposase levels from the...
متن کاملمنابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ذخیره در منابع من قبلا به منابع من ذحیره شده{@ msg_add @}
عنوان ژورنال
دوره 7 شماره 2
صفحات 45- 56
تاریخ انتشار 2019-09
با دنبال کردن یک ژورنال هنگامی که شماره جدید این ژورنال منتشر می شود به شما از طریق ایمیل اطلاع داده می شود.
کلمات کلیدی برای این مقاله ارائه نشده است
میزبانی شده توسط پلتفرم ابری doprax.com
copyright © 2015-2023