Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1088/1748-9326/aa75d1 |
A global, spatially-explicit assessment of irrigated croplands influenced by urban wastewater flows | |
Thebo, A. L.1; Drechsel, P.2; Lambin, E. F.3,4,5; Nelson, K. L.1 | |
2017-07-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS |
ISSN | 1748-9326 |
出版年 | 2017 |
卷号 | 12期号:7 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Sri Lanka; Belgium |
英文摘要 | When urban areas expand without concomitant increases in wastewater treatment capacity, vast quantities of wastewater are released to surface waters with little or no treatment. Downstream of many urban areas are large areas of irrigated croplands reliant on these same surface water sources. Case studies document the widespread use of untreated wastewater in irrigated agriculture, but due to the practical and political challenges of conducting a true census of this practice, its global extent is not well known except where reuse has been planned. This study used GIS-based modeling methods to develop the first spatially-explicit estimate of the global extent of irrigated croplands influenced by urban wastewater flows, including indirect wastewater use. These croplands were further classified by their likelihood of using poor quality water based on the spatial proximity of croplands to urban areas, urban wastewater return flow ratios, and proportion of wastewater treated. This study found that 65% (35.9 Mha) of downstream irrigated croplands were located in catchments with high levels of dependence on urban wastewater flows. These same catchments were home to 1.37 billion urban residents. Of these croplands, 29.3 Mha were located in countries with low levels of wastewater treatment and home to 885 million urban residents. These figures provide insight into the key role that water reuse plays in meeting the water and food needs of people around the world, and the need to invest in wastewater treatment to protect public health. |
英文关键词 | indirect water reuse water quality GIS spatial analysis return flow ratio urban sanitation wastewater treatment |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000404943700001 |
WOS关键词 | STREAM WATER ; QUALITY ; INDICATOR ; IMPACT ; RISK ; AGRICULTURE ; SANITATION ; BACTERIA ; HEALTH ; CITIES |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/15090 |
专题 | 气候变化 |
作者单位 | 1.Univ Calif Berkeley, Dept Civil & Environm Engn, OBrien Hall, Berkeley, CA 94720 USA; 2.Int Water Management Inst, 127 Sunil Mawatha, Pelawatte, Battaramulla, Sri Lanka; 3.Stanford Univ, Sch Earth Energy & Environm Sci, 473 Via Ortega, Stanford, CA 94305 USA; 4.Stanford Univ, Woods Inst Environm, 473 Via Ortega, Stanford, CA 94305 USA; 5.Catholic Univ Louvain, Georges Lemaitre Ctr Earth & Climate Res, Earth & Life Inst, Pl Louis Pasteur 3, B-1348 Louvain La Neuve, Belgium |
推荐引用方式 GB/T 7714 | Thebo, A. L.,Drechsel, P.,Lambin, E. F.,et al. A global, spatially-explicit assessment of irrigated croplands influenced by urban wastewater flows[J]. ENVIRONMENTAL RESEARCH LETTERS,2017,12(7). |
APA | Thebo, A. L.,Drechsel, P.,Lambin, E. F.,&Nelson, K. L..(2017).A global, spatially-explicit assessment of irrigated croplands influenced by urban wastewater flows.ENVIRONMENTAL RESEARCH LETTERS,12(7). |
MLA | Thebo, A. L.,et al."A global, spatially-explicit assessment of irrigated croplands influenced by urban wastewater flows".ENVIRONMENTAL RESEARCH LETTERS 12.7(2017). |
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