Results 71 to 80 of about 148,112 (211)

Impacto del cambio de uso de la tierra en la producción de sedimentos, en la parte alta de la cuenca del río Pixcayá, usando la ecuación MUSLE para los años 2003 y 2012

open access: yesAgua, Saneamiento & Ambiente, 2018
En la parte alta de la cuenca del río Pixcayá, se observa el aumento de áreas utilizadas para actividades agrícolas (sin prácticas de conservación de suelos) en zonas que presentan pendientes no aptas para la agricultura, lo cual causa erosión hídrica ...
Manuel Fernando Luna Lemus
doaj  

Geochemical behavior of heavy metals in differents environments in Rodrigo de Freitas lagoon - RJ/Brazil

open access: yesAnais da Academia Brasileira de Ciências, 2011
The accelerated urbanisation without a planning, brought several environmental problems to Rio de Janeiro coastal zone, especially in areas such as Rodrigo de Freitas lagoon, which receives a great amount of untreated sewage every day.
Estefan M Fonseca   +4 more
doaj   +1 more source

Sedimentological studies of the "Ilha de Marchantaria" in the Solimões/Amazon River near Manaus

open access: yes, 1983
Sedimentological studies on the Ilha de Marchantaria an island in the Amazon river near Manaus reveal the existence of four different structural main units.
Adis, J.   +3 more
core  

Benthic diatoms and some environmental conditions in three lowland streams [PDF]

open access: yes, 2002
This article reports on the ecological preferences of benthic diatoms in relation to pH, conductivity and organic pollution-eutrophication and their tolerance spectrums. Three Pampean streams subjected to different human impacts were studied.
Gomez, Nora, Licursi, Magdalena
core   +2 more sources

Notas sobre un depósito kárstico de marcasita de las inmediaciones de Llanes (Asturias) [PDF]

open access: yes, 1960
Anotaciones sobre los sedimentos de una paleoforma de absorción de karst fósil de Llanes (Asturias).Ministerio de ...
Martínez Álvarez, José Antonio
core  

Caracterización mineralógica y elemental de sedimentos sólidos de la laguna de Yantac, departamento de Junín, provincia de Yauli, distrito de Marcapomacocha, por difracción y fluorescencia de rayos X

open access: yesRevista del Instituto de Investigación de la Facultad de Minas, Metalurgia y Ciencias Geográficas, 2016
Las muestras en estudio fueron extraídas a lo largo de la ribera de la laguna de Yantac-Junín, siendo uno de los objetivos identificar los minerales contaminantes procedentes de la actividad humana (ganadera, agrícola, etc.) y otros.
Biviano Miramira   +2 more
doaj   +1 more source

Sedimentología de sucesiones sinrift tempranas en un semigraben marginal de un rift extensional: la Cuenca de Bijuesca, Jurásico superior de la Cordillera Ibérica (Zaragoza, España) [PDF]

open access: yes, 2011
Un estudio sedimentológico detallado de los primeros depósitos continentales sinrift que aparecen en el Semigraben de Bijuesca (Formaciones Ciria y Bijuesca), ha permitido entender la arquitectura estratigráfica de los sedimentos que representan el ...
Arribas Mocoroa, María Eugenia   +2 more
core   +1 more source

Influence of marine and continental processes on the dynamics of a sand-ridge at the mouth of the Mafaguaqu river (Caraguatabuba - SP): preliminary conditions</a> </p><span class="r_subtitle"><img src="/img/openaccess.ico" alt="open access: yes" title="open access: yes" width="16" height="16"><i>Brazilian Journal of Oceanography</i>, 1983 </span><br><span class="r_content">This paper deals with the sedimentation and erosion dynamics of a sand-ridge on the Maçaguaçu River mouth on the São Paulo coastal plain, north of Caraguatatuba Bay. Sedimentological, climatic and hydrodynamic data were analysed from an integrative point </span><br><span class="r_sub"><i>May Christine Modenesi<span id="ma_8" style="display:none">, Moysés Gonsalez Tessler, Olga Cruz, Armando Marcio Coimbra</span>   <small><a href="#" style="color:#808080;" onClick="return toggle_div(this, 'ma_8')">+3 more</a></small></i></span><br><small><a href="https://doaj.org/article/b0777d78714443aab5454ff338ff442d" target="_blank" rel="nofollow" title="doaj.org/article/b0777d78714443aab5454ff338ff442d">doaj</a> </small>   <div id="more_8" style="display:none"><a href="/sci_redir.php?doi=10.1590%2FS1679-87591983000100008" target="_blank" rel="nofollow">openaccessbutton.org (pdf)</a><br><a href="javascript:navigator.clipboard.writeText('10.1590/S1679-87591983000100008'); alert('Copied the doi');">copy doi</a> <small>(10.1590/S1679-87591983000100008)</small><br></div><small><a href="#" onClick="return toggle_div(this, 'more_8')">+1 more source</a></small><br></div><div class="r"><p class="r_title"><a href="https://core.ac.uk/download/46960436.pdf" target="_blank" rel="nofollow">Usando Teledetección para Identificar la Incidencia de Sedimentos del Canal del Dique en Sistemas Aquaticos Costeros</a> <b><a href="https://scholarworks.iupui.edu/bitstream/handle/1805/6605/Moreno_2015_Usando.pdf?sequence=1&isAllowed=y" target="_blank" rel="nofollow">[PDF]</a></b> </p><span class="r_subtitle"><img src="/img/openaccess.ico" alt="open access: yes" title="open access: yes" width="16" height="16">, 2015 </span><br><span class="r_content">En este estudio de caso, se usó tecnología de teledetección para analizar la distribución espacial de plumas de sedimentos suspendidos del Canal del Dique, Colombia, en el Mar Caribe y cuerpos de agua costeros.</span><br><span class="r_sub"><i>Irwin, Daniel E.<span id="ma_9" style="display:none">, Moreno-Madriñán, Max J., Rickman, Douglas L.</span>   <small><a href="#" style="color:#808080;" onClick="return toggle_div(this, 'ma_9')">+2 more</a></small></i></span><br><small><a href="https://core.ac.uk/works/26692611" target="_blank" rel="nofollow" title="core.ac.uk/works/26692611">core</a> </small>   <br></div><div class="r"><p class="r_title"><a href="https://doi.org/10.1016/S0016-7169(13)71461-2" target="_blank" rel="nofollow">Total mercury in terrestrial systems (air-soil-plant-water) at the mining region of San Joaquín, Queretaro, Mexico</a> </p><span class="r_subtitle"><img src="/img/openaccess.ico" alt="open access: yes" title="open access: yes" width="16" height="16"><i>Geofísica Internacional</i>, 2013 </span><br><span class="r_content">La deficiente minería de cinabrio dejó a San Joaquín altas concentraciones de mercurio en terreros de mina (2.4 – 4164 mg kg-1). Numerosas minas contribuyeron a la dispersión de mercurio en suelos agrícolas (0.5 – 314 mg kg-1) y suelos forestales (0.2 ...</span><br><span class="r_sub"><i>Sergio Martínez-Trinidad<span id="ma_10" style="display:none">, Gilberto Hernández Silva, Martha Elena Ramírez Islas, Juventino Martínez-Reyes, Gregorio Solorio Munguía, Sara Solís Valdez, Rocío García-Martínez</span>   <small><a href="#" style="color:#808080;" onClick="return toggle_div(this, 'ma_10')">+6 more</a></small></i></span><br><small><a href="https://doaj.org/article/620037efc5c24193b99aa2d7131893f1" target="_blank" rel="nofollow" title="doaj.org/article/620037efc5c24193b99aa2d7131893f1">doaj</a> </small>   <div id="more_10" style="display:none"><a href="/sci_redir.php?doi=10.1016%2FS0016-7169%2813%2971461-2" target="_blank" rel="nofollow">openaccessbutton.org (pdf)</a><br><a href="javascript:navigator.clipboard.writeText('10.1016/S0016-7169(13)71461-2'); alert('Copied the doi');">copy doi</a> <small>(10.1016/S0016-7169(13)71461-2)</small><br></div><small><a href="#" onClick="return toggle_div(this, 'more_10')">+1 more source</a></small><br></div><div class="r"><div style="margin-bottom:2px;overflow:hidden"><div style="display: inline-block; float: left; font-size: small; padding-right: 16px; margin-top: -1px; padding-bottom: 1px;"><a href="/q-sediments/" class="suggestion"onclick="show_loader();"><b>sediments</b></a><br/><a href="/q-chile/" class="suggestion"onclick="show_loader();"><b>chile</b></a><br/><a href="/q-13._climate_action/" class="suggestion"onclick="show_loader();"><b>13. climate action</b></a><br/></div><div style="display: inline-block; float: left; font-size: small; padding-right: 16px; margin-top: -1px; padding-bottom: 1px;"><a href="/q-6._clean_water/" class="suggestion"onclick="show_loader();"><b>6. clean water</b></a><br/><a href="/q-nutrientes/" class="suggestion"onclick="show_loader();"><b>nutrientes</b></a><br/><a href="/q-contaminaci%C3%B3n/" class="suggestion"onclick="show_loader();"><b>contaminación</b></a><br/></div><div style="display: inline-block; float: left; font-size: small; padding-right: 16px; margin-top: -1px; padding-bottom: 1px;"><a href="/q-metais/" class="suggestion"onclick="show_loader();"><b>metais</b></a><br/><a href="/q-agua/" class="suggestion"onclick="show_loader();"><b>agua</b></a><br/><a href="/q-15._life_on_land/" class="suggestion"onclick="show_loader();"><b>15. life on land</b></a><br/></div></div></div><div class="pagenav"><a href="/q-sedimentos/p-7/" rel="nofollow"><b>previous</b></a>   <a href="/q-sedimentos/p-6/" rel="nofollow">6</a>  <a href="/q-sedimentos/p-7/" rel="nofollow">7</a>  <b>8</b>  <a href="/q-sedimentos/p-9/" rel="nofollow">9</a>  <a href="/q-sedimentos/p-10/" rel="nofollow">10</a>   <a href="/q-sedimentos/p-9/" id="next" rel="nofollow"><b>next</b></a> </div><br></div> </div> <script>document.getElementById('loadingGif').style.display='none';</script><div style="width: 100%; height: 40px; bottom: 0px; background-color: #f5f5f5;"><div style="padding-left: 15px; padding-top: 10px"> <a href="/" rel="nofollow">Home</a> - <a href="/page-about/" rel="nofollow">About</a> - <a href="/page-disclaimer/" rel="nofollow">Disclaimer</a> - <a href="/page-privacy/" rel="nofollow">Privacy</a> </div></div> <link rel="stylesheet" href="//ajax.googleapis.com/ajax/libs/jqueryui/1.11.4/themes/smoothness/jquery-ui.min.css"/> </body> </html>