A review of mass flux monitoring and estimation methods for biogeochemical interface processes in watersheds

Abstract

The magnitude of mass flux is closely associated with biogeochemical watershed processes, which can generate a considerable amount of pertinent information. Moreover, both the accuracy and precision of mass flux estimation results directly affects the perception of the ecological environmental status, which in turn affects both the formulation and implementation of river basin management planning. In practical applications, the true value of flux is unknown and can only be estimated. Flux results obtained using different monitoring and estimation methods also differ significantly. However, in existing studies on mass flux associated with biogeochemical watershed interfaces, the application of monitoring and estimation methods lacks uniform criteria or references. Accordingly, this study summarizes and deconstructs results from recent studies on biogeochemical watershed interface processes and compares the advantages, disadvantages and applicability of the monitoring and estimation methods used by these studies. This particular study is intended to be used as a reference for the selection of flux calculation methods.

Review of Nonpoint Source Pollution Models: Current Status and Future Direction

“…The validity and accuracy of the data will directly affect the model performance and the understanding of NPS processes [77]. However, while the techniques of flux monitoring and estimation have been increasing, since the lack of uniform criteria of these methods and the data derived from different methods can be greatly different, data availability has not largely improved [78]. Therefore, there have been studies on model development and application for data shortage areas, and some studies have investigated the impact of limited data on different methods with a view to providing methodological implications for studies in areas with scarce data [79,80].…”

Soil and plant δ<sup>15</sup>N have a different response to experimental warming: A global meta-analysis

“…Nitrogen (N) is one of the most important nutrient elements for plant growth and the key limiting factors for vegetation productivity (McLay et al, 2001;Zhu et al, 2018;Lu et al, 2020). On the one hand, if the available N in the soil is insufficient, it will damage and weaken the ecosystem service function, including the supply of primary material products, water conservation, climate regulation, etc.…”

Soil <i>δ</i><sup>15</sup>N is a better indicator of ecosystem nitrogen cycling than plant <i>δ</i><sup>15</sup>N: A global meta-analysis

“…Nitrogen (N) is one of the most important nutrient elements for plant growth and the key limiting factor for vegetation productivity (McLay et al, 2001;Zhu et al, 2018;Lu et al, 2020). On the one hand, if the available N in the soil is insufficient, it will damage and weaken the ecosystem service function, including the supply of primary material products, water conservation, climate regulation, etc.…”