Small But Important: The Role of Small Floodplain Tributaries to River Nutrient Budgets,ACS Earth and Space Chemistry

当前位置： X-MOL 学术 › ACS Earth Space Chem. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Small But Important: The Role of Small Floodplain Tributaries to River Nutrient Budgets
ACS Earth and Space Chemistry ( IF 2.9 ) Pub Date : 2017-12-22 00:00:00 , DOI: 10.1021/acsearthspacechem.7b00112
Indra S. Sen ₁ , Soumita Boral ₁ , Sudhakar Ranjan ₁ , Sampat K. Tandon ₁

Affiliation

The fertile Indo-Gangetic floodplain contains numerous small, rain-fed rivers. These rivers contribute to the river water chemistry of the Ganges River; however, these small floodplain rivers are never studied nor monitored owing to their smaller size with reference to catchment area (∼1000–10000 km²) and volume of discharge (∼10–100 m³/s). Here we quantify the role of a small flood plain river, the Pandu River, in terms of dissolved inorganic nitrogen (DIN) and phosphate export to Ganges River. We present results from time series sampling campaigns over 2015 and 2016. Our result shows that Pandu River exports 793 ± 128 t/yr of DIN and 177 ± 29 t/yr phosphate to the Ganges River, which accounts for 0.1% and 0.42% of the total DIN and phosphate fluxes, respectively, that Ganges River exports into Bay of Bengal. Furthermore, we show that the small floodplain rivers in the Indo-Gangetic floodplain could collectively contribute ∼15% and ∼61% of the DIN and phosphate fluxes, respectively, that Ganges River delivers into Bay of Bengal. Therefore, runoff from small floodplain rivers is an important flux that could contribute to the dissolved nutrient budget of large river systems, and they must be better monitored to address future challenges in river basin management.

中文翻译：

小而重要：洪泛区小支流在河流养分预算中的作用

肥沃的印度－恒河洪泛区包含无数条小雨河。这些河流有助于恒河的河流水化学。但是，由于这些小型洪泛河的规模相对于集水区（〜1000–10000 km ²）和流量（〜10〜100 m ³）较小，因此从未对其进行研究或监测。/ s）。在这里，我们根据溶解的无机氮（DIN）和向恒河输出的磷酸盐的数量，来量化一条泛滥平原河（潘都河）的作用。我们展示了2015年和2016年的时间序列抽样活动的结果。我们的结果表明，Pan渡河向恒河的出口量为793±128吨/年的DIN和177±29吨/年的磷酸盐，分别占恒河的0.1％和0.42％恒河输出到孟加拉湾的总DIN和磷酸盐通量。此外，我们表明，印度恒河洪泛区中的小型洪泛区河流可共同贡献恒河向孟加拉湾输送的DIN和磷酸盐通量的约15％和〜61％。因此，洪泛区小河的径流是一个重要的流量，它可能有助于大河系统的溶解养分预算，

更新日期：2017-12-22

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文本刊介绍/投稿指南11