scholarly journals Historical records for the brine levels of Dingbian salt lakes (northern Shaanxi Province) and climatic implications, 1265-1949

2022 ◽  
Vol 34 (1) ◽  
pp. 272-285
Author(s):  
Dong Lingxiao ◽  
◽  
Fei Jie
Keyword(s):  
Salt Lakes ◽  
Shaanxi Province ◽  
Historical Records ◽  
Northern Shaanxi

scholarly journals Estimating Changes in the Green Water Productivity of Cropping Systems in Northern Shaanxi Province in China’s Loess Plateau

Water ◽  
2018 ◽  
Vol 10 (9) ◽  
pp. 1198 ◽  
Author(s):  
Jinping Wang ◽  
Jinzhu Ma ◽  
Afton Clarke-Sather ◽  
Jiansheng Qu
Keyword(s):  
Loess Plateau ◽  
Hydrological Modeling ◽  
Meteorological Data ◽  
Water Productivity ◽  
Experimental Studies ◽  
Northern Region ◽  
Green Water ◽  
Shaanxi Province ◽  
Cropping Patterns ◽  
Northern Shaanxi

Water shortages limit agricultural production in the world’s arid and semi-arid regions. The Northern region of China’s Shaanxi Province, in the Loess Plateau, is a good example. Raising the water productivity of rainfed grain production in this region is essential to increase food production and reduce poverty, thereby improving food security. To support efforts to increase crop water productivity (CWP), we accounted for limitations of most existing studies (experimental studies of specific crops or hydrological modeling approaches) by using actual field data derived from statistical reports of cropping patterns. We estimated the CWPs of nine primary crops grown in four counties in Northern Shaanxi from 1994 to 2008 by combining statistics on the cultivated area and yields with detailed estimates of evapotranspiration based on daily meteorological data. We further calculated both the caloric CWP of water (CCWP) and the CWP of productive water (i.e., water used for transpiration). We found that regional CWP averaged 6.333 kg mm–1 ha–1, the CCWP was 17,683.81 cal mm–1 ha–1, the CWP of productive green water was 8.837 kg mm–1 ha–1, and the CCWP of productive green water was 24,769.07 cal mm–1 ha–1. Corn, sorghum, and buckwheat had the highest CWP, and although potatoes had the largest planted area and relatively high CWP, they had a low CCWP.

scholarly journals Changes in the epidemiological characteristics of human brucellosis in Shaanxi Province from 2008 to 2020

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Cui-hong An ◽  
Zhi-guo Liu ◽  
Shou-min Nie ◽  
Yang-xin Sun ◽  
Suo-ping Fan ◽  
...  
Keyword(s):  
Incidence Rate ◽  
Large Scale ◽  
Small Ruminants ◽  
Raw Milk ◽  
Shaanxi Province ◽  
Significant Feature ◽  
Human Brucellosis ◽  
Northern Shaanxi ◽  
Southern Shaanxi ◽  
Epidemiological Characteristics

AbstractIn the present study, surveys of case numbers, constituent ratios, conventional biotyping, and multilocus sequence typing (MLST) were applied to characterize the incidence rate and epidemiological characteristics of human brucellosis in Shaanxi Province, China. A total of 12,215 human brucellosis cases were reported during 2008–2020, for an annual average incidence rate of 2.48/100,000. The most significant change was that the county numbers of reported cases increased from 36 in 2008 to 84 in 2020, with a geographic expansion trend from northern Shaanxi to Guanzhong, and southern Shaanxi regions; the incidence rate declined in previous epidemic northern Shaanxi regions while increasing each year in Guanzhong and southern Shaanxi regions such as Hancheng and Xianyang. The increased incidence was closely related to the development of large-scale small ruminants (goats and sheep) farms in Guanzhong and some southern Shaanxi regions. Another significant feature was that student cases (n = 261) were ranked second among all occupations, accounting for 2.14% of the total number of cases, with the majority due to drinking unsterilized goat milk. Three Brucella species were detected (B. melitensis (bv. 1, 2, 3 and variant), B. abortus bv. 3/6, and B. suis bv. 1) and were mainly distributed in the northern Shaanxi and Guanzhong regions. Three known STs (ST8, ST2, and ST14) were identified based on MLST analysis. The characteristics that had not changed were that B. melitensis strains belonging to the ST8 population were the dominant species and were observed in all nine regions during the examined periods. Strengthened human and animal brucellosis surveillance and restriction of the transfer of infected sheep (goats) as well as students avoiding drinking raw milk are suggested as optimal control strategies.

Geochemical Characteristics and Comprehensive Utilization of the Main Coal Seams in Wubu Mining Area, Northern Shaanxi Province

2013 ◽  
Vol 734-737 ◽  
pp. 755-758
Author(s):  
Zhi Xue Li ◽  
Ming Pei Li ◽  
Long Yi Shao
Keyword(s):  
Elemental Analysis ◽  
Chemical Properties ◽  
Calorific Value ◽  
Mining Area ◽  
Proximate Analysis ◽  
Shaanxi Province ◽  
Coal Seams ◽  
Comprehensive Utilization ◽  
Coal Analysis ◽  
Northern Shaanxi

Use a variety of coal analysis methods on the Wubu mining area main coal seams S1 and T1 in proximate analysis, elemental analysis, and technologic property analysis, the results show that the main coal seams is a kind of medium ash, medium volatile coal, especially low-medium sulfur, high calorific value coal. They have a good chemical properties and technologic properties, and can be used for coking, civilian, steam coal.

scholarly journals Research experiment on infiltration and runoff in Jujube land of northern Shaanxi Province

2015 ◽  
Vol 368 ◽  
pp. 174-179
Author(s):  
X. Song ◽  
P. Bai
Keyword(s):  
Relative Error ◽  
Mean Squared Error ◽  
Shaanxi Province ◽  
Richards Equation ◽  
Mean Relative Error ◽  
The North ◽  
Cumulative Infiltration ◽  
Northern Shaanxi ◽  
The Mean ◽  
Research Experiment

Abstract. To provide guidance for the efficient use of rainwater in Jujube forests of the northern Shaanxi Province, research on the processes of infiltration and runoff under field simulated rainfall were conducted. The process of infiltration and runoff-yield on sloping land was simulated with Richards equation and the water balance equation under different rainfall intensities and soil water content, in the north of Shaanxi province. It reached results via comparing with observation results: the mean relative error of the period cumulative infiltration was less than 3%, with a root mean squared error (RSME) less than 0.3. The mean relative error of the period cumulative runoff was less than 12.5%, RSME < 0.4. The simulation results were reasonable; however, the simulation ponding time generally lagged behind measured ponding time probably because of spatial variation of saturated hydraulic conductivity and uneven rainfall.

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