Results 1 to 10 of about 15,947 (239)

Numerical simulation and protection of the dynamic change of Jinan karst spring based on coupling of seepage and conduit flow

Heliyon, 2022
The objective of this study was to predict the dynamic change in the spring water level more precisely, to provide timely solutions for karst spring protection.
Changsuo Li, Liting Xing, Yanan Dong, Yuming Peng, Xuerui Xing, Chuanlei Li, Zhenhua Zhao   +6 more
doaj   +1 more source

Determination of Bromine in Brine by Wavelength Dispersive X-ray Fluorescence Spectrometry with Film Adsorption Pretreatment

Yankuang ceshi, 2015
Bromine exists mainly as ions in bromide brine and halide sulfate brine in the hydrosphere of the crust. Powder carrier pellet method is commonly used in analyzing bromine in brine by Wavelength Dispersive X-ray Fluorescence Spectrometry (WDXRF). However,
CHEN Jing-wei, SONG Jiang-tao, ZHAO Qing-ling, SONG Shuang-xi, TANG Yun-zhi, GENG Nan   +5 more
doaj   +1 more source

Determination of Hexavalent Chromium in Solid Waste by Inductively Coupled Plasma-Optical Emission Spectrometry with Microwave Digestion

Yankuang ceshi, 2021
BACKGROUND Hexavalent chromium is one of the necessary indices for monitoring the soil environment of solid waste and construction land. OBJECTIVES To establish a simple, accurate and precise method for the determination of Cr(Ⅵ).
ZHAO Qing-ling, LI Qing-cai, TAN Xian-feng, AN Mao-guo, CHEN Juan, MAO Xiu-li   +5 more
doaj   +1 more source

Analysis of the spatiotemporal evolution and driving factors of land use change in Jinan springs area of the Northern Karst region, China from 1986 to 2022

Discover Applied Sciences
The Jinan Spring Area serves as a representative of northern China’s karst regions. To explore the land-use change characteristics and their driving mechanisms, six periods of Landsat series land-use data were collected for the years 1986, 1995, 2000 ...
Shenting Gang, Xiaoyun Kong, Tao Jia, Minghui Lv, Lixia Li   +4 more
doaj   +1 more source

Hydrochemical characteristics and genesis analysis of hot springs in the Changtan area, Chongqing

Carsologica Sinica
This study takes the natural and artificially drilled hot springs as the research objects located in the northwest wing of the Fangdoushan anticline in Changtan Town, Wanzhou District, Chongqing City.
Cao LIU, Gaohai XU, Delong LI, Fuheng LUO, Haifeng XU, Cheng CHEN, Jianshu ZOU   +6 more
doaj   +1 more source

Geological Characteristics and Exploration Prospect of Black Shale in the Dongyuemiao Member of Lower Jurassic, the Eastern Sichuan Basin, China

Frontiers in Earth Science, 2021
China has yielded huge commercial production from the marine organic-rich shale but shows a slow exploration process in the lacustrine organic-rich shale.
Guodong Wei, Guodong Wei, Guodong Wei, Wei Wang, Wei Wang, Liang Feng, Xiucheng Tan, Chuan Yu, Chuan Yu, Hualian Zhang, Hualian Zhang, Zhiping Zhang, Zhiping Zhang, Shengxiu Wang, Shengxiu Wang   +14 more
doaj   +1 more source

3D geological model reconstruction and collapse risk evaluation of old goaf in Dunqiu iron mine

Scientific Reports
The complexity of goafs put forward higher requirements for detection methods. A comprehensive detection method for old goaf is proposed, that is, determining the plane distribution range of old goaf by using high-precision magnetic method, determining ...
Hailong Wang, Zhenhua Zhao, Lin Han, Zhenjiang Luo   +3 more
doaj   +1 more source

Occurrence Conditions and Hydrogeochemical Characteristics of High-Temperature Geothermal Resources in the Eastern Jiyang Depression

Yankuang ceshi
The eastern part of the Jiyang Depression possesses high-temperature geothermal resource potential due to the influence of the destruction of the North China craton, but there is a lack of systematic research on the occurrence conditions of high ...
Bo LI, Changsuo LI, Wenfeng GAO, Song YAO, Zhihua LI, Haibo SUI, Haoran LIU, Hongwei WANG   +7 more
doaj   +1 more source

Migration and distribution of complex fracture proppant in shale reservoir volume fracturing

Natural Gas Industry B, 2018
In this paper, a large-scale experimental system was established to identify the migration and distribution laws of complex fracture proppant in shale reservoir volume fracturing.
Linhua Pan, Ye Zhang, Lijun Cheng, Zhaohui Lu, Yuanbo Kang, Pei He, Bingqiang Dong   +6 more
doaj   +1 more source

Analysis on ecological characteristics of Mississippian coral reefs in Langping, Guangxi

Scientific Reports, 2022
Several Late Viséan-Serpukhovian coral reefs were identified in Langping, Tianlin. They provided an opportunity to investigate paleo-environments suitable for the development of reef-building communities and the construction of coral reefs in Langping ...
Dayong Yang, Honglun Chang, Xiao Liu, Peng Wan, Liming Shen   +4 more
doaj   +1 more source