Editing Flémalle (section)

=== Hydrography ===
[[File:090917-AIDE-Herstal-Station de pompage N1.jpg|thumb|Pumping station No.&nbsp;1 in [[Herstal]], similar to the old stations located on the left bank of the Meuse in Flémalle.|left]]
Flémalle is part of the Lower Meuse sub-basin. The municipality has only one navigable waterway, the Meuse, which traverses the municipality from west to east over a length of 7,646 meters. It has seven main watercourses (excluding the Meuse, these are the Awirs, Ville-en-Cours, Neuville, Pré Renard, Broussou, Bailesse, and Croisette) with a total length of 27,051 meters. The municipality has 4% of its territory designated as [[Floodplain|flood zones]], of which only 2.7% are at high flood risk.<ref name="2010_Service_publique_Wallonie">{{cite magazine |language=French |title=Environmental Report |periodical=Public Service of Wallonia |date=2010 }}</ref>

The organization managing the municipality's sanitation services is the Association intercommunale pour le démergement et l'épuration (AIDE). In 2008, 77% of the population's [[domestic wastewater]] was not treated by a public [[Wastewater treatment|treatment plant]]. In the same year, the municipality had a sewer network 158.24&nbsp;km long.<ref name="2010_Service_publique_Wallonie" />

In 2017, AIDE requested a budget from SPGE (the Public Water Management Company) for a study on the climate resilience of structures located on the left bank of the Meuse, including pumping stations No.&nbsp;1 and No.&nbsp;3 in Flémalle, which are old.<ref>{{cite magazine |language=French |title=Approval of the evaluation of the 2017–2019 Strategic Plan |periodical=Intermunicipal Association for Flood Control and Wastewater Treatment of the Province of Liège |date=19 December 2016 }}</ref>

Since the winter of 1977–1978, there has been a gradual rise in the water table related to the post-coal mining era in the province of Liège. Flémalle and other municipalities along the Meuse with a mining history are affected by this phenomenon.<ref>{{Cite web |title=Flood control system |url=https://www.aide.be/demergement/dispositif-de-demergement |website=aide.be |access-date=2021-04-23}}.</ref>

==== Islands ====
Before the construction of the [[Wharf|quays]] along the Meuse in 1937, numerous islands of varying sizes were scattered throughout the river. These islands once formed the "''Chokier bottleneck''",<ref group="B" name=":1">{{cite book|date=November 2011 |language=fr |page=13 |publisher=Commission Historique de Flémalle |title=Pro Justitia au code forestier – Ramet-Yvoz 1920–1942}}<!-- auto-translated from French by Module:CS1 translator --></ref> a challenging section for both upstream and downstream navigation. Before the development works, archaeological remains were found, including [[gladius|gladii]], [[funerary urn]]s, and [[coin]]s.<ref>{{Cite web |title=La Vie à Flémalle: Les Iles|url=http://kiminvati.com/paysdemeuse/Pages/ZDIV7AC3A3.php |website=kiminvati.com |access-date=2021-02-23}}.</ref> Some of the islands included Rensonnet, Champs de Bures, Trou des Veaux, Avocat, and one near Ivoz.<ref group="B" name=":1" /> There were no bridges connecting the shores, so crossing the river was done by boat.