Natural streamflow and IHAs. Celone River case study

Title Natural streamflow and IHA for setting an environmental flow. The Celone River case study Description Data reported in the present file refer to the Celone River (Apulia Region, Italy) at the river section downstream of the Capaccio Reservoir (41°26’06’’ N;15°25’51’’ E). Data include the natural streamflow at daily time scale and the Indicators of hydrological alterations (IHAs) computed from 1990 to 2009 by using the IHA software (The Nature Conservancy, 2009. Indicators of Hydrologic Alteration Version 7.1 User's Manual). Non-Parametric analysis was developed. Statistical analysis and flow duration curves are also provided in the file. The present dataset is useful to set an environmental flow by using hydrological methods and is propaedeutic for hydraulic methods. Daily streamflow data in natural conditions were obtained by using the SWAT model (De Girolamo et al., 2017). All the hydrological pressures such as point source discharge, water abstractions, and the reservoir were not included in the SWAT simulation (De Girolamo et al., 2017). The twenty years of daily streamflow data stored in the file were used to calculate the IHAs. As described by Richter et al. (1996), the IHAs are able to describe the hydrological regime of a river and are strictly related to the river ecology. Based on the assumption that the full range of variability of streamflow regime is needed to preserve the river ecosystem (Arthington, 2012; Poff et al., 1997), the environmental flow was designed for the Celone River by Acuña et al., 2020. References Acuña V., Jorda-Capdevila D., Vezza P., De Girolamo A.M., McClain M.E., Stubbington R., Pastor A.V., Lamouroux N., von Schiller D., Munné A., Datry T. 2020. Accounting for flow intermittency in environmental flows design. Journal of Applied Ecology, doi: 10.1111/1365-2664.13590 De Girolamo, A.M., Barca, E., Pappagallo, G. & Lo Porto, A. 2017. Simulating ecologically relevant hydrological indicators in a temporary river system. Agricultural Water Management, 180, 194–204. Arthington, A. (2012) Environmental Flows. Saving Rivers in the Third Millenium. University of California Press, Berkeley, California. Poff, N.L., Allan, J.D., Bain, M.B., Karr, J.R., Prestegaard, K.L., Richter, B.D., … Stromberg, J.C. (1997) The Natural Flow Regime. BioScience, 47, 769–784.## 标题 用于划定生态流量（environmental flow）的天然径流量与水文改变指标集（Indicators of Hydrologic Alteration, IHAs）——以切洛内河（Celone River）案例研究 ## 数据集描述 本文件所载数据对应意大利普利亚大区（Apulia Region）卡帕乔水库（Capaccio Reservoir）下游河段的切洛内河（Celone River），该河段地理坐标为北纬41°26′06″、东经15°25′51″。数据集包含日尺度天然径流量数据，以及1990年至2009年间借助水文改变指标（IHA）软件（美国自然保护协会，2009年，《水文改变指标7.1版用户手册》）计算得到的IHA指标集。本研究开展了非参数化分析，文件中同时提供了统计分析结果与流量历时曲线。 本数据集可用于通过水文方法划定生态流量，同时可为水力方法的应用提供前置基础。 天然条件下的日径流量数据通过SWAT模型（Soil and Water Assessment Tool）获取（De Girolamo等人，2017年）。该模型的模拟未纳入点源排放、取水及水库调控等各类水文胁迫因素（De Girolamo等人，2017年）。 文件中存储的20年日径流量数据被用于计算IHA指标集。正如Richter等人（1996年）所述，IHA指标集能够表征河流水文情势，且与河流生态系统密切相关。基于“维持河流生态系统需完整保留水文情势的全部变异范围”这一假设（Arthington, 2012; Poff等人, 1997），Acuña等人（2020年）为切洛内河设计了生态流量方案。 ## 参考文献 Acuña V., Jorda-Capdevila D., Vezza P., De Girolamo A.M., McClain M.E., Stubbington R., Pastor A.V., Lamouroux N., von Schiller D., Munné A., Datry T. 2020. 生态流量设计中的径流间歇性考量. 《应用生态学杂志》, DOI: 10.1111/1365-2664.13590 De Girolamo A.M., Barca E., Pappagallo G. & Lo Porto A. 2017. 临时河流系统中生态相关水文指标的模拟. 《农业水管理》, 180: 194–204 Arthington A. 2012. 《生态流量：第三千年的河流保护》. 加利福尼亚大学出版社，伯克利，加利福尼亚州 Poff N.L., Allan J.D., Bain M.B., Karr J.R., Prestegaard K.L., Richter B.D. 等, Stromberg J.C. 1997. 自然水文情势. 《生物科学》, 47: 769–784