对加利福尼亚州正在消退的萨尔顿海沿岸新兴湿地的水文地质和水化学影响

IF 2.6 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL
Barry Hibbs, Camila Bautista, Lillian Alwood, Margaret Drummond
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引用次数: 0

摘要

由于将科罗拉多河水引入萨尔顿海沟进行农业灌溉的方式发生了变化,萨尔顿海在过去二十年间经历了严重的衰退。因此,萨尔顿海沿岸一些裸露的沙丘地区出现了湿地,主要是在有大量农业回流和农业排水的地区。其中一个著名的湿地系统,即孟买海滩湿地,已在没有农业的萨尔顿海北岸形成。在其他许多农业资源有限或没有农业资源的地区,湿地未能发展起来,随着萨尔顿海的退缩,留下了裸露的泥滩表面。由于风吹尘埃中含有与泥沙沉积物相关的毒素,这些干燥的泥沙表面对当地居民的健康构成了严重威胁。在这项研究中,稳定水同位素数据与其他水文信息相结合,确定了孟买海滩湿地的两个潜在水源。第一种可能是热自流水单独成为湿地的水源,而第二种假设则是萨尔顿海河岸储水的排水与热自流水混合。热自流水排入流向孟买海滩湿地的排水沟,在到达湿地之前,最初可能没有地下水基流。随后,研究人员沿着接受热自流水的整个排水渠道进行了研究。沿排水道对溶解固体含量、P 和 N 营养物质、砷以及稳定的水同位素进行了同步测试。通过渠道调查,建立了一个新的盐碱化模型,该模型与渠道排水量、渠道形态计量学和渠道侵蚀有关。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Hydrogeologic and hydrochemical inputs to emerging wetlands on the shores of the receding Salton Sea, California

Hydrogeologic and hydrochemical inputs to emerging wetlands on the shores of the receding Salton Sea, California

The Salton Sea has experienced significant recession over the past two decades due to changes in the diversion of Colorado River water to the Salton Trough for agricultural irrigation. As a result, wetlands have emerged in some exposed playa areas along the Salton Sea, primarily in regions with extensive agricultural return flows and agricultural drainage. One notable wetland system, known as the Bombay Beach Wetlands, has formed on the north shore of the Salton Sea, in an area devoid of agriculture. In many other areas with limited or no agriculture, wetlands have failed to develop, leaving exposed playa surfaces as the Salton Sea recedes. These dry playa surfaces pose a significant threat to the health of local residents due to the presence of toxins contained in windblown dust associated with playa deposits. In this study, stable water isotope data, combined with other hydrological information, led to identification of two potential water sources for the Bombay Beach Wetlands. The first possibility proposes that thermal artesian waters alone contribute to the wetlands' water source, while the second hypothesis involves a combination of drainage from Salton Sea bank storage water mixing with the thermal artesian water. The thermal artesian water discharges into drainage channels that flow towards the Bombay Beach Wetlands, initially devoid of possible groundwater baseflow until reaching the wetlands. Studies were subsequently done along the full reach of the drainage channels receiving thermal artesian water. Dissolved solids content, P and N nutrients, arsenic, and stable water isotopes were tested synoptically along the drainage channels. Channel investigations led to the development of a novel model of salinization, which is linked to channel discharge, channel morphometrics, and channel incision.

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来源期刊
Journal of The American Water Resources Association
Journal of The American Water Resources Association 环境科学-地球科学综合
CiteScore
4.10
自引率
12.50%
发文量
100
审稿时长
3 months
期刊介绍: JAWRA seeks to be the preeminent scholarly publication on multidisciplinary water resources issues. JAWRA papers present ideas derived from multiple disciplines woven together to give insight into a critical water issue, or are based primarily upon a single discipline with important applications to other disciplines. Papers often cover the topics of recent AWRA conferences such as riparian ecology, geographic information systems, adaptive management, and water policy. JAWRA authors present work within their disciplinary fields to a broader audience. Our Associate Editors and reviewers reflect this diversity to ensure a knowledgeable and fair review of a broad range of topics. We particularly encourage submissions of papers which impart a ''take home message'' our readers can use.
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