<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://roble.intecca.uned.es/tematres/lem/">Hidrología</topic></authority><related type="narrower"><topic>Hidrografía</topic></related><related type="narrower"><topic>Hidrología forestal</topic></related><related type="narrower"><topic>Química del agua</topic></related><related type="narrower"><topic>Hidrogeología</topic></related><related type="narrower"><topic>Cataratas (Hidrología)</topic></related><related type="other"><topic>Limnología</topic></related><related type="other"><topic>Recursos hidráulicos</topic></related><related type="other"><topic>Isótopos radiactivos en hidrología</topic></related><related type="other"><topic>Agua</topic></related><related type="other"><topic>Hidrodinámica</topic></related><related type="broader"><topic>Ciencias naturales</topic></related></mads>