Prevención de Desastres (CENAPRED), mediante visitas de campo y súbitas en zonas rurales, con arrastre de sedimentos”, en Atlas Nacional de Riesgos. Distribución de población: 85% urbana y 15% rural; a nivel nacional el dato es de 76% y 24% respectivamente. Atlas Nacional de Riesgos. Distribución de población: 66% urbana y 34% rural; a nivel nacional el dato es de 76 y 24% respectivamente. Atlas Nacional de Riesgos.
|Published (Last):||13 May 2013|
|PDF File Size:||3.65 Mb|
|ePub File Size:||14.71 Mb|
|Price:||Free* [*Free Regsitration Required]|
Atlas Nacional De Riesgos
It is clear that the risk model may be improved by including additional elements in the vulnerability analyses. Consequently, disasters are not inevitable since they are frequently associated with lack of planning and prevention measures.
The number of events when precipitation was above mm in 3 days was used as a hazard index and was obtained from the records of climatological stations in those places. Vulnerability assessment in natural hazard and risk analysis: Natural disasters should be examined within a risk-perspective framework where cenapfed natural hazards and vulnerability are considered.
Hazard assessment of rainfall – induced landsliding in Mexico. The vulnerability index between and shows the low-frequency modulating effect of flood risk. Changes in land cover alter the HSG-NC characteristics and the regional vulnerability to intense rainfall by increasing runoff. Asian Geographer28 2 Moreover, in Tapachula or Acapulco, there is a trend toward more extreme precipitation events also contributing to the higher flood risk in recent decades forty years. Natural Hazards64 3 Heavy rainfall, represented by the P95 of daily precipitation, is more intense and frequent now than in previous decades, partially in relation to more tropical cyclones, as in the northeastern tropical Pacific.
Baja California Sur
In Mexico, the number of floods is increasing DesInventar, Fig. Consultado el 15 de junio de de Consultado el 15 de junio de de https: In general, they result from an intense hydrological cycle and increased human activities ceapred involve changes in the environment. The human cost of poor preparation for disasters. Monthly WeatherReview87 10 Our results indicate that the probability of floods grows as risk increases.
Atlas municipales de riesgos
Therefore, risk quantification is necessary for developing risk management actions, and vulnerability factors and indicators support actions that are deemed necessary to define efficient disaster prevention practices.
In nafional locations, intense rainfall is related to tropical cyclones, cold surges, mesoscale convective systems or easterly waves, and frequently last for more than three days.
In Monterrey, the hazard activity has not increased in recent decades, but risk has risen due to the increased vulnerability. On the other hand, the vulnerability to heavy rainfall depends on the physical conditions of the basins.
On the other hand, the dynamics of vulnerability of watersheds to heavy rainfall is becoming higher due to continuous changes in land cover and, consequently, the risk of floods has risen. Weather, Climate, and Naclonal8 2 Therefore, a diagnosis of the major causes of this type of disaster should be determined, and a risk management strategy should be implemented if the social, economic and environmental costs atlaz floods are to be reduced.
Section 2 describes the data and methodology used in the study.
Therefore, more floods are largely the result of human activities, given the important land-cover transformations. There are more flood naciinal for central and southern Mexico than for northern Mexico, not only because intense rainfall is more frequent, but also because deforestation is more severe in the former.
Under a simple naturalistic focus, one may think that the change in the hydrological cycle climate riegos has led to the increased frequency in the number of floods observed, but from a risk perspective one should consider changes in the natural hazard as well as in the vulnerability context in which more frequent intense rainfall is now occurring. The hazard may be characterized as condition at,as extreme weather in a period of time, for instance by means of the 95 th percentil of daily precipitation, which indicates where extreme events have a certain intensity.
These illustrate that water management or issues related to hydraulic infrastructure may crnapred flood-risk factors. Pauline in was a much stronger tropical cyclone than Manuel inbut vulnerability was higher in recent years, which led to a more intense flood disaster.
These factors should be considered as part of a comprehensive flood risk analysis in order to reduce the negative impacts of floods on a more exposed society. A Global Survey vol. Los desastres naturales deben examinarse dentro de un marco de perspectivas de riesgo donde se consideran tanto los cwnapred naturales como la vulnerabilidad.
Search | Atlas Nacional de Riesgos
The slope of the terrain influences the amount of runoff and flood-prone areas. Consultado el 20 de mayo de de Consultado aglas 20 de mayo de de http: Journal of Hydrology1 More landfalling tropical cyclones in this region have led to more frequent floods. The midsummer drought over Mexico and Central America. Journal of Climate12 6 Research in therapeutic recreation: Chapter 10 Estimation of direct runoff from storm rainfall.
It was calculated according to the morphological characteristics of the terrain Pedraza, ; Weiss, using a digital elevation model INEGI, Climate Research47 Over the northern part of Mexico, floods tend to be more frequent during September, once the soil is saturated.