Modelling of melt and runoff in a basin with debris covered glacier parts in the upper Aksu catchment, northwest China

中国目前正在西北地区经历一场对水文循环产生根本影响的气候变化。在严重干旱地区，冰川融化水对农业和粮食生产至关重要。冰上冰川的广泛分布是该区域的一个重要冰川学特征，对融化速度有重大影响。了解和量化气候和次碎屑融化的相互作用对于评估当前形势和预测未来产水量是至关重要的。在这个项目中，将开发一个模型，通过将经验和无定形统计方法与遥感技术相结合，再现冰雹覆盖下的烧蚀。这个模型将被应用到现有的水文模型中，然后它将能够模拟冰川碎片覆盖的集水区的径流。径流模型将根据观测的水文气象数据进行校准。随后，对未来气候和冰川作用的设想将有助于提高我们对气候-冰川-径流相互作用的理解，并确定水文循环的变化。

Northwest China currently experiences a climate change with fundamental consequences forthe hydrological cycle. In the strongly arid region, glacier meltwater is essential for agricultureand food production. The vast distribution of supraglacial moraine is an importantglaciological feature of the region and has major impact on melt rates. It is essential tounderstand and quantify the interaction of climate and sub-debris melt in order to asses thecurrent situation and to predict future water yield. Within this project, a model will bedeveloped to reproduce ablation under moraine cover by combining an empirical and amorphological-statistical approach with remote sensing techniques. This model will beimplemented into an existing hydrological model, which will then be capable to simulaterunoff in catchments with debris covered glaciers parts. The runoff model will be calibratedwith observed hydrometeorological data. Subsequently, scenario runs for future climate andglaciation will allow to improve our understanding in climate-glacier-runoff interaction and todetermine changes in the hydrological cycle.