Water-level declines, land subsidence, and specific compaction near Apache Junction, south-central Arizona

1987 ◽  
Keyword(s):  
Water Level ◽  
Land Subsidence ◽  
South Central ◽  
Central Arizona

scholarly journals Research on critical groundwater level under the threshold value of land subsidence in the typical region of Beijing

2015 ◽  
Vol 372 ◽  
pp. 507-510
Author(s):  
Y. Jiang ◽  
J.-R. Liu ◽  
Y. Luo ◽  
Y. Yang ◽  
F. Tian ◽  
...  
Keyword(s):  
Water Level ◽  
Water Table ◽  
Land Subsidence ◽  
Groundwater Level ◽  
Threshold Value ◽  
Scientific Basis ◽  
Good Time ◽  
Linear Regression Models ◽  
Control Plan ◽  
Time Space

Abstract. Groundwater in Beijing has been excessively exploited in a long time, causing the groundwater level continued to declining and land subsidence areas expanding, which restrained the economic and social sustainable development. Long years of study show good time-space corresponding relationship between groundwater level and land subsidence. To providing scientific basis for the following land subsidence prevention and treatment, quantitative research between groundwater level and settlement is necessary. Multi-linear regression models are set up by long series factual monitoring data about layered water table and settlement in the Tianzhu monitoring station. The results show that: layered settlement is closely related to water table, water level variation and amplitude, especially the water table. Finally, according to the threshold value in the land subsidence prevention and control plan of China (45, 30, 25 mm), the minimum allowable layered water level in this region while settlement achieving the threshold value is calculated between −18.448 and −10.082 m. The results provide a reasonable and operable control target of groundwater level for rational adjustment of groundwater exploited horizon in the future.

Applying Water-Level Difference Control to Central Arizona Project

2011 ◽  
Vol 137 (12) ◽  
pp. 747-753 ◽  
Author(s):  
G. Guan ◽  
A. J. Clemmens ◽  
T. F. Kacerek ◽  
B. T. Wahlin
Keyword(s):  
Water Level ◽  
Central Arizona Project ◽  
Level Difference ◽  
Central Arizona

scholarly journals Study of Flood and Coastal Flood Control in Madukoro Area, Semarang City, Indonesia

2018 ◽  
Vol 4 (3) ◽  
pp. 189
Author(s):  
Dian Wahyu Jatmiko
Keyword(s):  
Water Level ◽  
Land Subsidence ◽  
Return Period ◽  
Flood Control ◽  
High Tide ◽  
Northern Coast ◽  
Flood Peak ◽  
Runoff Volume ◽  
Total Runoff ◽  
Drainage Channels

Madukoro area located on the northern coast of Semarang City has been prone to flooding caused by rainfall and seawater high-tide. Ineffective flood control management and land subsidence are considered as the cause of this problem. In order to understand land subsidence effect and flood control performance, location, water surface height of the inundation in West Flood Canal, western part of Madukoro area need to analyze. Flood analysis was conducted using HEC-HMS software and rational method. Flow hydraulics on five channels, i.e. the West Flood Canal, Ronggolawe River, Karangayu River, Arterial Channel and Madukoro were analyzed using HEC-RAS software. Increasing levee level and additional water pumps in Madukoro and Ronggolawe were chosen as flood control alternatives. Its performance was investigated through software simulation. The results showed total runoff volume in all drainage channels for 2-years return period discharge was about 80% of capacity with 0.7 m water depth. Runoff volume in West Flood Canal with 50-years return period discharge was about 40%. Land subsidence 4 cm/year affected the water level increase on West Flood Canal. Operation of 2 - 4 pump units could not significantly decrease water level at flood peak, yet increase flood recession time 6 - 8 hours. 

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