Results 71 to 80 of about 153,181 (207)

Groundwater Contamination in Karst Areas of Southwestern China and Recommended Countermeasures

open access: yesActa Carsologica, 2010
Approximately 33% of China is karstic. The most extensive karst areas are in southwestern China and cover approximate­ly 540,000 km2. Southwestern China hosts some of the most typical karst landforms in the world and has important high-quality karst ...
Fang Guo, Daoxian Yuan, Zhengjiao Qin
doaj   +1 more source

Experiment on monitoring and early warning of karst collapses based on acoustic emission technology

open access: yesCarsologica Sinica
The karst collapse is a dynamic geological process in which the damage of soil mass and development of cavity ultimately result in the instability of the overburden layer.
Zongyuan PAN   +8 more
doaj   +1 more source

Characteristics of heavy metal element content and health risk assessment in groundwater in Zhaojue area, Sichuan Province, China

open access: yesScientific Reports
Groundwater serves as the primary drinking water source for residents in the Zhaojue area, located in the hinterland of the Daliang Mountains in Sichuan Province.
Yongsheng Lin   +6 more
doaj   +1 more source

Zoning of ecological treatment in typical karst areas based on ecosystem vulnerability assessment

open access: yesCarsologica Sinica
Guohua Demonstration Zone for Ecological Restoration of Desertification (hereinafter referred to as Guohua Demonstration Zone) is located in Guohua town, Pingguo City, Guangxi, with a total area of 30 km2.
Zhaoxin HU   +4 more
doaj   +1 more source

Overview on karst geology of Vietnam

open access: yesCarsologica Sinica
Karst is widely distributed in Vietnam, covering almost 60,000 km2, approximately 20% of the total area of Vietnam. Most karst rocks crop out in North and Central Vietnam. Karst developed with peak-clusters, peak-forests, caves, etc.
Yanlan WEI   +4 more
doaj   +1 more source

The Dark Star of Baisun-tau: a history of cave exploration in Southern Uzbekistan, 1990–2013 [PDF]

open access: yes, 2014
Very little is known about the karst and caves in southern Uzbekistan, where some of the deepest caves in Asia have been discovered. In particular, the limestone plateau of the Baisun-tau mountain range has a tremendous potential for exploration.
Breitenbach, Sebastian   +3 more
core   +1 more source

A Conceptualized Groundwater Flow Model Development for Integration with Surface Hydrology Model

open access: yes, 2017
A groundwater system model was developed and calibrated in the study area of Lehman Creek watershed, eastern Nevada. The model development aims for integrating the surface hydrologic model - precipitation runoff modeling system (PRMS) model - with the ...
Ahmad, Sajjad, Chen, Chao, Kalra, Ajay
core   +1 more source

PECCI Code (Python Estimation for Carbon Concentration and Isotopes) for Calculating the Concentration and Stable Carbon Isotopic Composition of Dissolved Inorganic Carbon (DIC) in Precipitation for northwestern Arkansas [PDF]

open access: yes, 2014
In karst settings, hydrograph separations using isotopic tracers are commonly and effectively used to quantify the proportions of rain rapidly delivered to springs along fractures and conduits during storm events.
Hays, Phillip D., Knierim, Katherine J.
core   +2 more sources

Spatiotemporal evolution of landscape stability in World Heritage Karst Sites: a case study of Shibing Karst and Libo-Huanjiang Karst

open access: yesHeritage Science
Landscape stability is a paramount concern within the field of landscape ecology. Indices of landscape patterns not only facilitate an effective analysis of land use transformations but also delve into the mechanisms of landscape disturbances across ...
Xue Bai   +3 more
doaj   +1 more source

Research advance for uranium isotope as a quantitative proxy for paleo-oceans anoxic or oxic environment

open access: yesCarsologica Sinica
Compared with other elements that are sensitive to redox environments (U, Mo, V, S, Fe, Cu, Zn, Ni), uranium isotopes have the advantage to quantitatively reflect long-term and global-scale paleoredox of oceans, due to its uniform composition in the ...
Qukan LUO   +7 more
doaj   +1 more source

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