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A decision tool for sustainable agricultural policies: the case of water saving scenarios for Apulia Region (Southern Italy)

机译：可持续农业政策的决策工具：普利亚大区（意大利南部）节水情景的案例

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摘要

The economy of Apulia Region largely depends on agriculture but the scarce water resources are the main factor threatening the sustainable production of this sector. This paper describes a geographical information system (GIS) based water balance tool that integrates maps of crops, climate and soil parameters with various scenarios of cropping pattern and farming practice changes. The aim is to assess the implication of these scenarios on the spatial and volumetric water needs of the region's irrigated agriculture. The total net volumetric irrigation needs, under current land use and full irrigation practices, were estimated on an average year to be 973 million m(3). The deficit irrigation practices currently used in Capitanata water districts can save a volume of 302 million m(3) if they are extrapolated over the entire region. Based on the Common Agricultural Policy (CAP), a replacement of 30% of the actual tomato areas in Foggia Province with sunflowers (energy crop) or durum wheat (rainfed crop) has potential water saving of 9 million m(3) and 67 million m(3), respectively. An additional 103 million m(3) of water saving may be obtained through modernisation of the vineyards' growing practices. Findings of this paper could be used to address the agricultural policies towards a sustainable use of the scarce fresh water.
机译：普利亚地区的经济在很大程度上取决于农业，但是稀缺的水资源是威胁该部门可持续生产的主要因素。本文介绍了一种基于地理信息系统（GIS）的水平衡工具，该工具将农作物，气候和土壤参数的地图与各种种植模式和耕作方式变化结合在一起。目的是评估这些情景对该地区灌溉农业的空间和体积水需求的影响。在当前土地使用和完全灌溉的情况下，总的净容积灌溉需求估计平均每年为9.73亿平方米（3）。如果将Capitanata水域目前的赤字灌溉方式推广到整个地区，则可以节省3.02亿平方米（3）的土地。根据共同农业政策（CAP），用向日葵（能源作物）或硬质小麦（雨水作物）替代福贾省实际番茄面积的30％，可节水900万平方米（3）和6700万公顷m（3）。通过使葡萄园的种植方式现代化，可以额外节省1.03亿立方米（3）的水资源。本文的发现可用于解决可持续利用稀缺淡水的农业政策。

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