Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 3

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: high mountain

Sortuj według:

Ogranicz wyniki do:

Developing Criteria for Assessing The Stability of Water Supply Models in High Mountains and Water-Scare Areas

Nguyen Manh Truong, Dinh Anh Tuan, Nguyen Tiep Tan, Vu Thi Hong Nghia, Do Van Binh

Inżynieria Mineralna

2023

no. 2, vol. 1

179--186

The article presents the scientific basis for assessing the stability of water supply models and develops a suitable set of criteria to assess the stability of water supply works, which includes the water supply part for water supply works and systems (including headworks and water distribution systems) in high mountains and water-scarce areas in Vietnam. Research results indicate that in order to improve the stability and availability of water of the models that have been, are and will be built, it is necessary to have a common method of evaluating effectiveness for scientific models of domestic water supply. Accordingly, it is necessary to build obtain a suitable set of criteria to assess the stability of the water supply model (source + water supply works) in the high mountains, water-scarce areas in Vietnam.

Temperature and humidity monitoring to identify ideal periods for liquefaction on Earth and Mars : data from the High Andes

Kereszturi Akos, Pal Bernardett, Gyenis Akos

Geological Quarterly

2020

Vol. 64, No. 4

898--914

During an almost two week-long field campaign in the Atacama Desert high altitude region of Ojos del Salado volcano, temperature (T) and relative humidity (RH) values were monitored on the surface and <1-5 cm sized rocks, focusing on the night-time values. The aim was to identify and evaluate potential temporal characteristics of daily T and RH changes, searching for ideal periods for deliquescence that has recently been proposed for Mars. Although the atmospheric pressure on Mars is much lower than on Earth, and the atmosphere is drier in general, the huge daily temperature fluctuation there could produce elevated humidity values at night-time; this aspect has thus been analysed on Earth at a desert location, where because of the high elevation night-time cooling is very strong, just like on Mars. Different nearby surface locations showed the same temporal T/RH characteristics, but evident variations were observed between different days. Strong fluctuations could be observed on 10-20 minute long temporal scales, that might influence the deliquescence process, and should be accounted for in future missions aiming to analyse this process on Mars. Night-time periods were favourable for deliquescence. Among the modelled Mars-relevant salts [CaCl2, Ca(ClO4)2, Mg(ClO4)2, NaCl] the longest durations of possible deliquescence were for CaCl2, Ca(ClO4)2 and Mg(ClO4)2, ~7-12 hours for one day. The duration for deliquescence showed some increase along with the rising elevation, due to the decreasing night-time temperature. Thus despite the low humidity on Mars, the cold nights may cause elevated RH towards deliquescence. The Atacama Desert locations analysed are a useful analogue of the deliquescence process on Mars. Fluctuation in RH was observed in night-time, suggesting that similar variability might be present on Mars, and that should be considered in the future, including in evaluating how fast the microscopic liquid formation progresses. Night-time slope winds expected on Mars might have a strong impact on the local T/RH conditions. A more detailed analysis in the future should focus on identifying and separating regions with and without much of the expected night-time fluctuation.

Foraging strategies and dietary preferences of a high mountain ant. (Hymenoptera: Formicidae)

Fernandez-Escudero I., Tinaut A.

Polish Journal of Ecology

1998

Vol. 46, no 1

23-31

The ant Proformica longiseta inhabits the dry zones of the Mediterranean high mountain. A generalist feeder, this species has a predilection for liquid food, and its solid diet changes over the active period according to the prey available. It forages alone without recruitment or cooperation. The abundance of repletes varies in parallel to the quantity of food collected, representing a solution for food shortage periods. The territories surrounding the nests are not clearly defined, but rather overlap with foraging areas of several ant nests.