Seasonality of dammed tropical rivers

Seasonality of dammed tropical rivers | Authorea try { document.documentElement.classList.add('js'); } catch (e) { } var _gaq = _gaq || []; _gaq.push(['_setAccount', 'G-8VDV14Y67G']); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); })(); Skip to main content Preprints Collections Wiley Open Research IET Open Research Ecological Society of Japan All Collections About About Authorea FAQs Contact Us Quick Search anywhere Search for preprint articles, keywords, etc. Search Search ADVANCED SEARCH SCROLL This is a preprint and has not been peer reviewed. Data may be preliminary. 10 May 2025 V1 Latest version Share on Seasonality of dammed tropical rivers Author : Camila Jimenez-Saenz 0000-0002-3053-3030 [email protected] Authors Info & Affiliations https://doi.org/10.22541/au.174685878.83917379/v1 237 views 178 downloads Contents Abstract Supplementary Material Information & Authors Metrics & Citations View Options References Figures Tables Media Share Abstract Seasonal variability, understood as intra-annual patterns in the rise and fall of river levels, has implications for ecosystems and the populations that inhabit them. Despite the growing hydropower generation in tropical countries, there is little research on how dams alter these patterns. Most conclusions have been drawn from rivers in other latitudes with different seasonal characteristics (Chong et al., 2021). Recognising that seasonal variability downstream of dams not only responds to seasonal climatic patterns and long-standing socio-natural interactions (Jackson et al., 2022) but also reflects fluctuations in energy market (Krause, 2017), the aim of this paper is to describe the complexity of the new conditions imposed by a hydropower dam on the seasonality of stream flow in a tropical river. To advance in this, we analyzed seasonal patterns of daily, weekly and monthly flows in three Colombian rainfall dominated rivers before and after damming and explored their relationship with the energy market. A composite methodology was used for the statistical analysis of the time series, their entropies and signal frequencies. The results suggest that in tropical rivers, hydropower dams decouple stream flow from precipitation, reduce stream flow harmonics, amplitude and intensity at monthly scale, and increase peaks frequency and number at weekly and daily scales. Dams, also reduce stream flow standard deviation and transition gradualness at sub monthly scales. We show how the use of a single index masks changes in seasonal diversity and tropical river variability and illustrate how the dominant frequencies of the energy market regroup stream flow variability on different time scales. Supplementary Material File (seasonality of dammed tropical rivers.docx) Download 877.48 KB Information & Authors Information Version history V1 Version 1 10 May 2025 Copyright This work is licensed under a Non Exclusive No Reuse License. Keywords colombian rivers dams dam´s impact hydropower seasonality tropical rivers Authors Affiliations Camila Jimenez-Saenz 0000-0002-3053-3030 [email protected] Pontificia Universidad Javeriana View all articles by this author Metrics & Citations Metrics Article Usage 237 views 178 downloads .FvxKWukQNSOunydq8rnd { width: 100px; } Citations Download citation Camila Jimenez-Saenz. Seasonality of dammed tropical rivers. Authorea . 10 May 2025. DOI: https://doi.org/10.22541/au.174685878.83917379/v1 If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download. For more information or tips please see 'Downloading to a citation manager' in the Help menu . Format Please select one from the list RIS (ProCite, Reference Manager) EndNote BibTex Medlars RefWorks Direct import Tips for downloading citations document.getElementById('citMgrHelpLink').addEventListener('click', function() { popupHelp(this.href); return false; }); $(".js__slcInclude").on("change", function(e){ if ($(this).val() == 'refworks') $('#direct').prop("checked", false); $('#direct').prop("disabled", ($(this).val() == 'refworks')); }); View Options View options PDF View PDF Figures Tables Media Share Share Share article link Copy Link Copied! Copying failed. Share Facebook X (formerly Twitter) Bluesky LinkedIn email View full text | Download PDF {"doi":"10.22541/au.174685878.83917379/v1","type":"Article"} Now Reading: Share Figures Tables Close figure viewer Back to article Figure title goes here Change zoom level Go to figure location within the article Download figure Toggle share panel Toggle share panel Share Toggle information panel Toggle information panel Go to previous graphic Go to next graphic Go to previous table Go to next table All figures All tables View all material View all material xrefBack.goTo xrefBack.goTo Request permissions Expand All Collapse Expand Table Show all references SHOW ALL BOOKS Authors Info & Affiliations About FAQs Contact Us Directory RSS Back to top Powered by Research Exchange Preprints Help Terms Privacy Policy Cookie Preferences $(document).ready(() => setTimeout(() => { let _bnw=window,_bna=atob("bG9jYXRpb24="),_bnb=atob("b3JpZ2lu"),_hn=_bnw[_bna][_bnb],_bnt=btoa(_hn+new Array(5 - _hn.length % 4).join(" ")); $.get("/resource/lodash?t="+_bnt); },4000)); (function(){function c(){var b=a.contentDocument||a.contentWindow.document;if(b){var d=b.createElement('script');d.innerHTML="window.__CF$cv$params={r:'9ffcda215f5e58f4',t:'MTc3OTQ2MzcyMQ=='};var a=document.createElement('script');a.src='/cdn-cgi/challenge-platform/scripts/jsd/main.js';document.getElementsByTagName('head')[0].appendChild(a);";b.getElementsByTagName('head')[0].appendChild(d)}}if(document.body){var a=document.createElement('iframe');a.height=1;a.width=1;a.style.position='absolute';a.style.top=0;a.style.left=0;a.style.border='none';a.style.visibility='hidden';document.body.appendChild(a);if('loading'!==document.readyState)c();else if(window.addEventListener)document.addEventListener('DOMContentLoaded',c);else{var e=document.onreadystatechange||function(){};document.onreadystatechange=function(b){e(b);'loading'!==document.readyState&&(document.onreadystatechange=e,c())}}}})();