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首页> 外文期刊>Acta Horticulturae >A daily water balance estimate for climate risk evaluation at a local scale.
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A daily water balance estimate for climate risk evaluation at a local scale.

机译：每天进行水平衡估算，以评估当地的气候风险。

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摘要

A methodology for calculating soil water balance based on climatological and pedological data of Sardinia (Italy) is presented. Daily temperature and rainfall data from the reference period 1971-2000 were spatially interpolated on a 10 km x 10 km cell grid to obtain a set of homogeneously distributed values. Pedological information of Sardinian soils was used to characterize the entire territory of Sardinia in terms of available water content (AWC) and soil depth. Reference evapotranspiration values were estimated using the Hargreaves method and actual evapotranspiration estimates were calculated as a function of soil water content for each grid cell. A simplified soil water balance was calculated for each grid point and year to determine the average daily soil water content over the 30-year period. Climatic risk was evaluated considering the number of days when soil water content was below 50% of the AWC threshold for each year during the 1971-2000 period. Results showed a wide variability of interannual climatic and water deficit conditions throughout the region. Maps of spatial distribution of drought conditions showed that the driest years were from 1996 to 2000. During this 5-year period, ~60% of the Sardinian territory was affected by severe climatic conditions which determined high climatic risk for agricultural areas.
机译：提出了一种基于撒丁岛（意大利）的气候学和土壤学数据计算土壤水分平衡的方法。将参考期1971-2000年的每日温度和降雨量数据空间插值到10 km x 10 km的单元格上，以获得一组均匀分布的值。撒丁岛土壤的土壤学信息用于根据可用水含量（AWC）和土壤深度表征撒丁岛的整个领土。使用Hargreaves方法估算参考蒸散量，并根据每个网格单元的土壤含水量计算实际的蒸散量估算值。为每个网格点和年份计算简化的土壤水平衡，以确定30年期间的平均每日土壤含水量。考虑到1971-2000年期间每年土壤含水量低于AWC阈值的50％的天数，评估了气候风险。结果表明，整个地区的年际气候和缺水状况变化很大。干旱条件的空间分布图显示，最干旱的年份是1996年至2000年。在这5年中，约60％的撒丁岛领土受到恶劣气候条件的影响，这决定了农业地区的高气候风险。

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