Abstract

The Kud’ma River, a tributary of the Cheboksary Reservoir, has been studied to evaluate the contributions of the surface and subsurface runoff components and perched groundwater runoff to the diffuse export of mineral nitrogen and phosphorus from river catchment areas in the northern part of the forest-steppe zone in the Volga basin. The role of water balance elements in the removal of nutrients has been shown to vary considerably both from season to season and in the long-term aspect. The proportions of the atmospheric and landscape components in the balance have been determined. The nutrient runoff has been shown to increase considerably in the recent years because of the greater role of new hydroclimatic conditions, especially, an increase in the runoff of infiltration origin (groundwater and perched water). Promising lines of further studies of nutrient removal from river catchments are proposed.

中文翻译：

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库德马河流域营养平衡的当前特征和动态。2. 氮磷的季节性去除

摘要

对切​​博克萨雷水库支流库德马河进行了研究，以评估地表和地下径流成分以及栖息地下水径流对河流北部河流集水区矿质氮和磷的扩散输出的贡献。伏尔加河流域的森林草原地带。水平衡元素在去除养分方面的作用已被证明在不同季节和长期方面都有很大差异。大气和景观成分在平衡中的比例已经确定。近年来，由于新的水文气候条件的作用更大，特别是渗透源（地下水和栖息水）的径流增加，养分径流已显着增加。