Determination of Sustainable Yield in Urban Groundwater Systems: Beijing, China

2006 ◽  
Vol 11 (1) ◽  
pp. 21-28 ◽  
Author(s):  
Lei Zhang ◽  
Christopher Kennedy
Keyword(s):  
Urban Groundwater ◽  
Sustainable Yield ◽  
Groundwater Systems ◽  
Beijing China

Thermoluminescence Dating of Coarse-Grain Quartz from the Malan Loess at Zhaitang Section, China

1987 ◽  
Vol 28 (3) ◽  
pp. 356-363 ◽  
Author(s):  
Lu Yanchou ◽  
A. J. Mortlock ◽  
D. M. Price ◽  
M. L. Readhead
Keyword(s):  
Age Determination ◽  
Total Sample ◽  
Coarse Grain ◽  
Annual Dose ◽  
Fine Grain ◽  
Malan Loess ◽  
Thermoluminescence Dating ◽  
Beijing China ◽  
Good Agreement

AbstractThermoluminescence (TL) ages were obtained for five loess samples taken from the Zhaitang section near Beijing, China, using the coarse-grain quartz technique. The paleodose values have been determined by the method of total sample bleaching and regeneration of the TL growth curve. The method appears to be suitable for the age determination of loess samples up to about 150,000 yr where the annual dose-rate values are of the order 3–4 mGy/yr. This limit is a function of the total accumulated dose. The ages are in good agreement with those obtained by a fine-grain TL technique and are consistent with geological and geomagnetostratigraphic evidence.

scholarly journals Determination of The Status of Utilization and Level of Sepat (Trichogaster sp) in Public Waters of Mainland Banjar Regency

2019 ◽  
Vol 5 (1) ◽  
pp. 11-17
Author(s):  
Irhamsyah Irhamsyah ◽  
Novita Sari ◽  
Iriansyah Iriansyah
Keyword(s):  
Maximum Sustainable Yield ◽  
Catch Rate ◽  
Survey Method ◽  
Utilization Rate ◽  
Sustainable Yield ◽  
Effort Level ◽  
Surplus Production ◽  
The Status

 The fishing of Sepat (Trichogaster sp) in freshwaters of Banjar Regency with a solid intensity that has lasted long enough. This study aims: (1) Knowing the model of surplus production that can be used. (2) Knowing the optimum effort Sepat  (3) Knowing maximum sustainable yield. (4) Knowing the utilization level of Sepat. (5) Knowing the effort level of Sepat. The method that used in this research is survey method and collecting data. Data is analyzed by the Schaefer’s model and Fox’s model. The result of this research: (1) The best model is the Schaefer model with R2 and validation value. (2) The catch rate of Sepat is 45630 trip per year. (3) Maximum sustainable yield of Sepat is 45,466 ton per year. (4) The utilization rate of Sepat (Trichogaster sp) is 33%  which shows there has been no more catch under fishing (5) Effort level of Sepat  is 16 %.

Fuzzy vulnerability mapping of urban groundwater systems to nitrate contamination

2017 ◽  
Vol 96 ◽  
pp. 146-157 ◽  
Author(s):  
Parisa Asadi ◽  
Seiyed Mossa Hosseini ◽  
Behzad Ataie-Ashtiani ◽  
Craig T. Simmons
Keyword(s):  
Urban Groundwater ◽  
Nitrate Contamination ◽  
Vulnerability Mapping ◽  
Groundwater Systems

scholarly journals SPME-GC-MSD for Determination of Nine Phenyl Compounds in Snow Water in Beijing China

2005 ◽  
Vol 62 (1-2) ◽  
pp. 109-111 ◽  
Author(s):  
Shan Zhou ◽  
Junxiong Huang ◽  
Xing Gao ◽  
Liwen Zhao
Keyword(s):  
Snow Water ◽  
Beijing China ◽  
Phenyl Compounds
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