Streamflow response to land use/land cover change in the tropical Andes using multiple SWAT model variants

Journal of Hydrology Regional Studies, Journal Year: 2024, Volume and Issue: 54, P. 101888 - 101888

Published: July 19, 2024

Language: Английский

Forest Dieback Alters Nutrient Pathways in a Temperate Headwater Catchment

Hydrological Processes, Journal Year: 2024, Volume and Issue: 38(10)

Published: Oct. 1, 2024

ABSTRACT Forested headwater catchments ensure good water quality for downstream ecosystems and human consumption. Climate change the exacerbating likelihood of extreme events elevate risk severe forest dieback. However, effects dieback on quantity stream are not fully understood. Here, we analyse high‐frequency observations discharge, electrical conductivity (EC), dissolved organic carbon (DOC) nitrate (NO 3 N) obtained before, during after a drought‐induced in German Harz Mountains. We focus characteristics concentration‐discharge (C‐Q) relationships at scale runoff to assess sources, mobilisation pathways EC, DOC NO N. When comparing pre‐ post‐dieback conditions, found significant increase efficiency doubling loads exported from catchment, while concentrations increased only moderately their C‐Q patterns did change. EC exhibit no changes but steepening dilution patterns. explain these findings with dieback‐induced decrease evapotranspiration, which leads more intensive drainage upper soil layers riparian zone. In contrast, observed strong N fluxes by factor ~5, event changed enrichment dilution. argue that led an excess hillslopes connect via surficial flowpaths. this way, bypasses zone, reducing catchment's attenuating nutrient. Our study emphasises pivotal role zones mediating streams. Different configurations zone its connection network may be missing piece explaining differences responses

Language: Английский

Assessing the Impacts of Nature-Based Solutions on Ecosystem Services: A Water-Energy-Food-Ecosystems Nexus Approach in the Nima River Sub-Basin (Colombia)

Forests, Journal Year: 2024, Volume and Issue: 15(11), P. 1852 - 1852

Published: Oct. 23, 2024

Forest ecosystem services are critical for maintaining ecological balance and supporting human well-being from different perspectives. However, rapid land use changes driven by agricultural expansion, urbanization, industrial activities have significantly altered forest ecosystems, degrading the they provide. We here conduct an service assessment through biophysical economic estimates a multipurpose Andean water sub-basin in western Colombia. compare business as usual (BAU) with nature-based solution (NbS) scenario focused on landscape restoration. The research employed participatory methods NbS selection valuation techniques to evaluate flow regulation, provisioning, purification, food provisioning services. Results show that yielded net positive impact across most evaluated services, notable trade-offs. Specifically, increased retention 2.9% compared BAU. Water regulation demonstrated substantial benefit, increasing EUR 11.39 million/year scenario. On other hand, presented reduction of 3.2 These findings highlight potential forest-based address Water–Energy–Food–Ecosystem (WEFE) nexus challenges. study’s outcomes provide valuable insights policymakers practitioners, development Payment Ecosystem Services schemes integrating into planning decision-making processes.

Language: Английский