Abstract A GIS-based multi-criteria approach is applied in the Upper Murray River basin (Australian Alps) and Rapel River basin (Chilean Dry Andes) to project both biophysical and irrigation potential land suitability. Agricultural adaptation guidelines are then suggested in the context of agricultural expansion, land use change and water management. The findings show, first, the orographic hydro-climate patterns are the primary control over land suitability, its uncertainty and sensitivity. Second, the expected land suitability reduction during the 21st century will be driven primarily by catchment-level irrigation potential deficits even over the declining farm-level biophysical conditions. Third, a distinctive functionality for flatter and steeper agricultural systems is likely to be identifiable from land suitability trajectories. Further applications should be focused on regional-type studies and improvements regarding the effectiveness of expert judgement, validation, non-linear/daily dynamics and the influence of extreme climatology on land suitability.

中文翻译：

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澳大利亚阿尔卑斯山和智利干旱安第斯山脉传统亚高山作物的土地适宜性预测。结合生物物理和灌溉潜力的观点

摘要 基于 GIS 的多标准方法应用于上墨累河流域（澳大利亚阿尔卑斯山）和拉佩尔河流域（智利干旱安第斯山脉），以预测生物物理和灌溉潜力的土地适宜性。然后在农业扩张、土地利用变化和水资源管理的背景下提出农业适应指南。研究结果表明，首先，地形水文气候模式是土地适宜性、不确定性和敏感性的主要控制因素。其次，即使在农场级生物物理条件下降的情况下，21 世纪预期的土地适宜性下降将主要由集水区灌溉潜力不足所驱动。第三，更平坦和更陡峭的农业系统的独特功能可能可以从土地适宜性轨迹中识别出来。