Knowledge Resource Center for Ecological Environment in Arid Area
| DOI | 10.1080/15324982.2019.1635662 |
| Soil and groundwater salinization in Siwa Oasis and management opportunities: twenty year change detection and assessment | |
| Aly, Anwar A.1,2 | |
| 通讯作者 | Aly, Anwar A. |
| 来源期刊 | ARID LAND RESEARCH AND MANAGEMENT
 |
| ISSN | 1532-4982 |
| EISSN | 1532-4990 |
| 出版年 | 2020 |
| 卷号 | 34期号:2页码:117-135 |
| 英文摘要 | The use of saline groundwater in irrigation due to the limited availability of fresh water is one of the main causes of land degradation in arid and semi-arid environments. The agro-ecosystem of Siwa Oasis was monitored over a period of two decades. A stable isotope study, oxygen-18 and deuterium, indicated that Siwa groundwater is of meteoric origin. Siwa has two groundwater aquifers: a shallow limestone aquifer, LA, with highly saline water (Total Dissolved Solids, TDS, up to 6848 mg/L), and a deep Nubian sandstone aquifer, NSA, containing fresh water (TDS 192-256 mg/L). The sodium adsorption ratio, SAR, of LA water is high with an average value of 13.9 while the SAR of NSA water is low with an average value of 2.1. Schoeller and Piper's diagrams showed that LA water was of sodium, chloride-sulfate type, while the NSA water was classified as sodium carbonate and bicarbonate water type. Saturation Index (SI) calculations showed that both the LA and NSA water were undersaturated to halite minerals. Consequently, there is room to accommodate extra Na+ and Cl- from halite. Most Siwa land is irrigated with LA water due to low drilling costs. LA groundwater and Siwa soils were found to be deteriorating dramatically and the average water and soil salinity increased by 30-36% per decade. No change in NSA water quality was recorded over the same period. Interventions for the restoration of the deteriorated Siwa ecosystem are summarized. The approach conducted in this study can be repeated in similar ecosystems. |
| 英文关键词 | Groundwater quality irrigation soil quality stable isotope sustainability |
| 类型 | Article |
| 语种 | 英语 |
| 国家 | Egypt ; Saudi Arabia |
| 收录类别 | SCI-E |
| WOS记录号 | WOS:000474649500001 |
| WOS关键词 | QUALITY ; WATER ; RESOURCES ; REGION |
| WOS类目 | Environmental Sciences ; Soil Science |
| WOS研究方向 | Environmental Sciences & Ecology ; Agriculture |
| 来源机构 | King Saud University |
| 资源类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/214406 |
| 作者单位 | 1.Alexandria Univ, Fac Agr, Soil & Water Sci Dept, Alexandria, Egypt; 2.King Saud Univ, Coll Food & Agr Sci, Soil Sci Dept, Riyadh, Saudi Arabia |
| 推荐引用方式 GB/T 7714 | Aly, Anwar A.. Soil and groundwater salinization in Siwa Oasis and management opportunities: twenty year change detection and assessment[J]. King Saud University,2020,34(2):117-135. |
| APA | Aly, Anwar A..(2020).Soil and groundwater salinization in Siwa Oasis and management opportunities: twenty year change detection and assessment.ARID LAND RESEARCH AND MANAGEMENT,34(2),117-135. |
| MLA | Aly, Anwar A.."Soil and groundwater salinization in Siwa Oasis and management opportunities: twenty year change detection and assessment".ARID LAND RESEARCH AND MANAGEMENT 34.2(2020):117-135. |
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