scholarly journals Isotopic composition of rainfall in Baja California Sur, México

2021 ◽  
Vol 5 (3) ◽  
pp. 93-100
Author(s):  
Luis González- Hita ◽  
Miguel Angel Mejía-González ◽  
Blanca Carteño- Martinez ◽  
Juan Carlos Aparicio-González ◽  
Dustin Mañón- Flores
Keyword(s):  
Stable Isotopes ◽  
Tropical Cyclones ◽  
Baja California ◽  
Global Network ◽  
Baja California Sur ◽  
Least Squares Regression ◽  
Average Value ◽  
Isotope Data ◽  
The City

The study of the connection between precipitation and groundwater recharge/discharge using stable isotopes has been limited in México. One of the main limitations is the lack of local stable isotopes monitoring for rainfall. Indeed, only two stations of the Global Network of Isotopes in Precipitation operated in Mexico from 1962 to 1988. This study reports temporal characterization of stable isotopes in meteoric waters in the northwest of Mexico that has been lacking up to the present. Stable isotope analyses of the rain collected in the city of Loreto, state of Baja California Sur, from 2018 to 2021 were conducted using laser water isotope analyzers Picarro L2110-i and Los Gatos Research LWIA-45EP. A least squares regression of the isotope data was used to obtain the local meteoric water line: δ2H =8 δ18O + 9.4 (r2=0.98). The average value of winter rain is δ18O=-2.46 ‰ and δ2H=-10.2 ‰, monsoon rain δ18O=-4.93 ‰ y δ2H=-30.3 ‰, atmospheric river rain δ18O=-5.35 ‰ and δ2H=-33.3 ‰ and tropical cyclones rain δ18O= -10.7 ‰ y δ2H=-76.3. Isotope data indicated that tropical cyclones are the main source of recharge for the coastal aquifers of Baja California, Sur.

scholarly journals Integrated Runoff-Storm Surge Flood Hazard Mapping Associated with Tropical Cyclones in the Suburbs of La Paz, Baja California Sur, México

GeoHazards ◽  
2021 ◽  
Vol 3 (1) ◽  
pp. 1-15
Author(s):  
Miguel Angel Imaz-Lamadrid ◽  
Jobst Wurl ◽  
Ernesto Ramos-Velázquez ◽  
Jaqueline Rodríguez-Trasviña
Keyword(s):  
Tropical Cyclones ◽  
Storm Surge ◽  
Baja California ◽  
The State ◽  
Hazard Mapping ◽  
Climate Change Scenarios ◽  
Baja California Sur ◽  
La Paz ◽  
The Impact ◽  
The City

Floods are amongst the most frequent and destructive type of disaster, causing significant damage to communities. Globally, there is an increasing trend in the damage caused by floods generated by several factors. Flooding is characterized by the overflow of water onto dry land. Tropical cyclones generate floods due to excess water in rivers and streams and storm surges; however, the hazard of both phenomena is presented separately. In this research we present a methodology for the estimation of flood hazards related to tropical cyclones, integrating runoff and storm surge floods. As a case study, we selected the south-western suburbs of the city of La Paz, the capital of the state of Baja California Sur in northwest Mexico. The city has experienced in recent years an expansion of the urban area. In addition, there is an infrastructure of great importance such as the transpeninsular highway that connects the capital with the north of the state, as well as the international airport. Our results indicate that urban areas, agricultural lands, as well as the air force base, airport, and portions of the transpeninsular highway are in hazardous flood areas, making necessary to reduce the exposure and vulnerability to these tropical cyclone-related events. A resulting map was effective in defining those areas that would be exposed to flooding in the face of the impact of tropical cyclones and considering climate change scenarios, which represents an invaluable source of information for society and decision-makers for comprehensive risk management and disaster prevention.

scholarly journals Vulnerability and Risk Factors due to Tropical Cyclones in Coastal Cities of Baja California Sur, Mexico

Climate ◽  
2020 ◽  
Vol 8 (12) ◽  
pp. 144
Author(s):  
Elvia Aida Marín-Monroy ◽  
Víctor Hernández-Trejo ◽  
Eleonora Romero-Vadillo ◽  
Antonina Ivanova-Boncheva
Keyword(s):  
Risk Factors ◽  
Adverse Events ◽  
Tropical Cyclones ◽  
Baja California ◽  
Baja California Sur ◽  
Risk Effects ◽  
Coastal Cities ◽  
Ecological Vulnerability ◽  
Available Information ◽  
Tourist Region

Coastal cities have seen an unprecedented growth with regional settlements due to development activities; that is why measures are needed to mitigate risk of adverse events such as tropical cyclones. Baja California Sur, a state known as a relevant ecological and tourist region, includes destinations such as Cabo San Lucas and La Paz, impacted yearly by tropical cyclones, so it is important to design contingency plans and provide available information to the residents. Los Cabos municipality has the highest population growth rate and its inhabitants are more susceptible to adverse events; despite this, there were no indicators of social and ecological vulnerability to risk effects of tropical cyclones. The objective of this research is to calculate the socio-environmental vulnerability of households through an index to identify risk factors. We have obtained a classification according to levels of vulnerability, and the results have shown that 74% of the households are high on the vulnerability scale, 21% of households are moderately vulnerable and only the remaining 5% of households are less vulnerable. In conclusion, the devastating effects of hydrometeorological events were mainly due to a lack of knowledge regarding such events among inhabitants.

scholarly journals Research on Echinoderms in Latin America V

2021 ◽  
Vol 69 (Suppl.1) ◽  
pp. I-XXIII
Author(s):  
Rebeca Granja-Fernández ◽  
María-Dinorah Herrero-Pérezrul ◽  
Juan-José Alvarado
Keyword(s):  
Latin America ◽  
New Species ◽  
Latin American ◽  
Baja California ◽  
Baja California Sur ◽  
La Paz ◽  
Scientific Papers ◽  
The City ◽  
Species Taxonomy ◽  
New Distribution

It is a pleasure for us to present this compendium that represents the sixth product of publications of the Iberoamerican Echinoderm Network (RIE), corresponding to 40 scientific papers presented at the Fourth Latin American Conference of Echinoderms, held from November 10th to 15th 2019 in the city of La Paz, Baja California Sur, Mexico. These works encompass aspects of echinoderms such as descriptions of new species, taxonomy, lists of species, new distribution records, paleontology, ecology, reproduction, physiology and aquaculture.

Trophic interactions between shark species on the western coast of Baja California Sur: Inferences from stable isotopes

2020 ◽  
Vol 39 ◽  
pp. 101463
Author(s):  
Eduardo David Méndez-Da Silveira ◽  
Yassir Edén Torres-Rojas ◽  
Felipe Galvan-Magaña ◽  
Alberto Sanchez-González ◽  
Fernando Elorriaga-Verplancken ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Trophic Interactions ◽  
Baja California ◽  
Western Coast ◽  
Shark Species ◽  
Baja California Sur

scholarly journals Molecular Characterization of Chelonid Alphaherpesvirus 5 in a Black Turtle (Chelonia mydas) Fibropapilloma from Baja California Sur, Mexico

Animals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 105
Author(s):  
Eduardo Reséndiz ◽  
Helena Fernández-Sanz ◽  
José Francisco Domínguez-Contreras ◽  
Amelly Hyldaí Ramos-Díaz ◽  
Agnese Mancini ◽  
...  
Keyword(s):  
Molecular Characterization ◽  
Molecular Analysis ◽  
Baja California ◽  
Clinical Signs ◽  
Chelonia Mydas ◽  
Baja California Sur ◽  
Epidermal Hyperplasia ◽  
Routine Monitoring ◽  
Hematological Values

During routine monitoring in Ojo de Liebre Lagoon, Mexico, a juvenile black turtle (Chelonia mydas) was captured, physically examined, measured, weighed, sampled, and tagged. The turtle showed no clinical signs suggestive of disease. Eleven months later, this turtle was recaptured in the same area, during which one lesion suggestive of fibropapilloma on the neck was identified and sampled for histopathology and molecular analysis. Histopathology revealed hyperkeratosis, epidermal hyperplasia, acanthosis, papillary differentiation and ballooning degeneration of epidermal cells, increased fibroblasts in the dermis, and angiogenesis, among other things. Hematological values were similar to those reported for clinically healthy black turtles and did not show notable changes between the first capture and the recapture; likewise, clinicopathological evaluation did not show structural or functional damage in the turtle’s systems. The chelonid alphaherpesvirus 5 (ChHV5) UL30 gene was amplified and sequenced for phylogeny; Bayesian reconstruction showed a high alignment with the genus Scutavirus of the Eastern Pacific group. This is one of the first reports of ChHV5 in a cutaneous fibropapilloma of a black turtle in the Baja California peninsula.

scholarly journals Physico-chemical and microbiological characterization of the ground water across the city Bareilly (U.P.), India

2011 ◽  
Vol 3 (2) ◽  
pp. 315-318
Author(s):  
D. R. Khanna ◽  
Shivom Singh ◽  
Neetu Saxena ◽  
R. Bhutiani ◽  
Gagan Matta ◽  
...  
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Water Quality Index ◽  
Quality Index ◽  
Underground Water ◽  
Total Hardness ◽  
Average Value ◽  
Physico Chemical ◽  
The City

The drinking water quality (underground water) of Bareilly city has been assessed by estimating physicochemical parameters and calculating Water Quality Index (WQI). Water Quality Index plays an important role in interpreting the information on water quality. The WQI of different sites shows that drinking water is of good quality. The correlation between different parameters was also estimated. During course of study the average value of physico-chemical parameters studied were observed as temperature 20.17 o C, turbidity 2.17 NTU, pH 8.13, electrical conductivity 1360 mmhos/cm, total dissolved solids 1218.9 mg/l, total hardness 515.0 mg/l chlorides 106.34 mg/l, alkalinity 342.15, fluorides 0.44 mg/l, sulphates 84.68 mg/l, nitrates 22.83 mg/l, DO 2.44 mg/l, BOD 1.26 mg/l. While average MPN were observed as 5.66 and average WQI as 21.48.

scholarly journals Assessment of Socio-Environmental Vulnerability Due to Tropical Cyclones in La Paz, Baja California Sur, Mexico

2020 ◽  
Vol 12 (4) ◽  
pp. 1575
Author(s):  
Elvia Aida Marín-Monroy ◽  
Víctor Hernández Trejo ◽  
Miguel Angel Ojeda Ruiz de la Pena ◽  
Gerzain Avilés Polanco ◽  
Nuñez León Barbara
Keyword(s):  
Adverse Events ◽  
Tropical Cyclones ◽  
Forest Fires ◽  
Baja California ◽  
Vulnerability Index ◽  
Baja California Sur ◽  
La Paz ◽  
Environmental Vulnerability ◽  
Vulnerable Households ◽  
High Degree

Climate change will increase the likelihood of adverse events such as droughts, forest fires, and intensification of tropical cyclones, which are known to cause flooding (IPCC, 2014). The effects of these events are a cause of concern for both authorities and citizens, so they prioritize actions that reduce adverse impacts, especially in cities with higher risk. Therefore, the objective of this work was to measure the degree of socio-environmental vulnerability of households to identify the risk areas in the city of La Paz, Baja California Sur, one of the regions with a high degree of incidence of hurricanes in the northwest of Mexico. For this, surveys were carried out with heads of households in 251 homes, and information was aggregated to calculate the vulnerability index through principal components analysis (PCA), which were stratified by the Dalenius–Hodges method, the degree of vulnerability was classified into three categories by the Opiyo method, considering three strata of the Likert scale, 1 = highly vulnerable, 2 = moderately vulnerable, 3 = less vulnerable. The results showed that households that are in the highly vulnerable category are 33% within a range of the index −3.77243 to −0.939141. Moderately vulnerable households constitute 36% with values from −0.929141 to 0.956385. While the least vulnerable represent 31% of households with an index range of 0.966385 to 5.6952. The results have revealed the levels of high and moderate socio-environmental vulnerability by tropical cyclones of 69% homes in La Paz. The above allowed to generate risk maps that will be taken into account in planning and civil protection over adverse events.

scholarly journals Chemical characterization of the soluble polysaccharides of the red alga Acanthophora spicifera from La Paz Bay, Baja California Sur, México

2020 ◽  
Vol 46 (3) ◽  
pp. 165-176
Author(s):  
Valérie Chantal Gabrielle Schnoller ◽  
Gustavo Hernández-Carmona ◽  
Enrique Hernández-Garibay ◽  
Juan Manuel López-Vivas ◽  
Mauricio Muñoz-Ochoa
Keyword(s):  
Baja California ◽  
Chemical Characterization ◽  
Red Alga ◽  
Baja California Sur ◽  
La Paz
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