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首页> 外文期刊>Australian journal of water resources >On spatiotemporal drought classification in New South Wales: Development and evaluation of alternative techniques
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On spatiotemporal drought classification in New South Wales: Development and evaluation of alternative techniques

机译：关于新南威尔士州的时空干旱分类：替代技术的发展和评估

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摘要

The identification, monitoring and characterisation of drought are of importance in water resources management and planning in Australia. The predominance of agriculture and water-rich activities on the eastern seaboard of Australia and the susceptibility of these industries to drought events makes an understanding of the spatial and temporal characteristics of drought significant to long-term water resources and agricultural planning. To assist in the quantification of the risk of the spatial extent of drought, the Standardised Precipitation Index (SPI) and system of percentiles were used to characterise the frequency, severity and spatial extent of drought incidence in 30 meteorological districts of New South Wales (NSW), Australia, for the period 1913-2002. Monthly district rainfall was aggregated on 1, 2, 3, 6, 9,12 and 24-month time scales, and characterised by SPIs and plotting positions for each phase. To assist in determining the spatial and temporal relationships of drought in NSW, drought severity-area-frequency curves were developed, enabling an assessment of the severity of drought throughout the state. Results obtained were contrasted with historical drought years to show the relationship between the severity and spatial extent of drought events, as well as distinguishing short, medium and long-term drought in NSW. The two methods of drought identification are evaluated against several substantive criteria and recommendations for future practice given.
机译：干旱的识别，监测和表征在澳大利亚的水资源管理和规划中至关重要。澳大利亚东部沿海地区农业和富水活动的盛行以及这些行业易受干旱事件的影响，使人们认识到干旱的时空特征对长期水资源和农业计划具有重要意义。为了帮助量化干旱空间干旱的风险，使用标准化降水指数（SPI）和百分位数系统来表征新南威尔士州（NSW）30个气象区干旱发生的频率，严重程度和空间范围），时间为1913-2002年。每月的区域降雨汇总在1、2、3、6、9、12和24个月的时间尺度上，并以SPI和每个阶段的绘图位置为特征。为了帮助确定新南威尔士州干旱的时空关系，开发了干旱严重性-面积-频率曲线，从而可以评估整个州的干旱严重性。将获得的结果与历史干旱年份进行对比，以表明干旱事件的严重程度与空间范围之间的关系，并区分新南威尔士州的短期，中期和长期干旱。根据几种实质性标准对两种干旱识别方法进行了评估，并提出了针对未来实践的建议。

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