Abstract

On the basis of corrected Landsat data for 2013–2017, a modern assessment of aufeis in the Indigirka River basin and its partial catchments with an area of 1830 to 305000 km² was conducted. The potential contribution of the aufeis flow to the formation of the water balance of rivers during various phases of hydrological regime was calculated. During the phase of the maximum development, the aufeis area of partial catchments ranges from 0.30 to 1.49%, reaching 0.54% of the total area of the Indigirka River basin. The aufeis resources (water content in aufeis) of the Indigirka River basin are 10.0 mm of the runoff level or in total 3.5 km³. For individual rivers, the aufeis flow can reach 5–28 mm per year, which makes up 2.6 to 20.8% (an average is 8.1%) of river runoff. On average, water resources stored in aufeis make up 235% of the winter river flow (135% for the Indigirka River basin). The contribution of the aufeis flow during the spring flood can reach 39% and is 13.7% in the outlet of the Indigirka River basin. The ambiguous impact of climate change on aufeis (reducing their area and increasing their number) requires further detailed studies.

中文翻译：

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Indigirka河流域Aufeis资源估算

摘要

根据 2013-2017 年校正的 Landsat 数据，对 Indigirka 河流域及其 1830 至 305000 km ²的部分流域的奥菲斯进行了现代评估 。计算了奥菲斯流在水文状况不同阶段对河流水平衡形成的潜在贡献。在最大开发阶段，部分流域的奥菲斯面积在 0.30% 到 1.49% 之间，达到 Indigirka 河流域总面积的 0.54%。Indigirka 河流域的 aufeis 资源（aufeis 中的含水量）为径流水位的 10.0 mm 或总计 3.5 km ³. 对于个别河流，奥菲斯流量可达每年5-28毫米，占河流径流的2.6-20.8%（平均为8.1%）。平均而言，奥菲斯储存的水资源占冬季河流流量的 235%（Indigirka 河流域为 135%）。春季洪水期间奥菲斯流量的贡献率可达39%，在Indigirka河流域出口为13.7%。气候变化对奥菲斯的模糊影响（减少面积和增加数量）需要进一步详细研究。