水资源 / 地表水

我们做什么

坎贝尔科学公司构建无人值守的长期水位和流量监测系统,广泛用于许多环境,包括水井、水坝、溪流、雨水排水系统和水/污水处理厂。无论盐度水平,污染水平,或其他恶劣的环境条件,我们的系统都能提供可靠的测量。坎贝尔的系统可以通过GOES卫星、授权频率的电台、IP蜂窝电话modem、射频电台和其他方式进行通讯。 了解更多

检查一下关于我们的设备能够胜任该领域的一些极好案例

洪水预警 洪水预警
水力发电 水力发电

有关更多详细信息我们 地表水 系统

Measuring Water Level

Our systems use 6-wire resistive gages or vibrating-wire pressure transducers for measuring groundwater level. In deep observation wells, these pressure transducers provide accurate water level measurement. We use piezometers, bubblers, or float and pulley systems to measure water level in shallow water applications. On the high end of groundwater level measurements, our portable pump and slug test systems can simultaneously measure water level in up to 8 wells, yet are easy to setup and customize from site to site.

For surface water level, measurements are often made in a vertical stand-pipe (stilling well) installed adjacent to a lake, river, or stream. The stream level (stage) is the same as the water elevation in the stilling well. A float and pulley is often used, but pressure transducers, ultrasonic, and resistive tape sensors work well also. Self-calibrating double bubblers are accurate sensors for measuring water level, and have the added benefit of keeping the sensor out of the measured liquid—critical in corrosive environments.

Measuring Water Flow

Water flow is usually calculated using a structure built across an open channel, such as a weir or flume. The water level is measured as it flows through the structure. Discharge rates are determined by using a site-unique rating curve and the water level. A float and pulley system, strain gage pressure transducer, or ultrasonic sensor may be used in stilling wells to measure water level fluctuations, then calculate flow.

New sensors that use ultrasonic and Doppler technologies to measure water velocities in two or three dimensions are also available. Velocity is measured directly; additional calculations are not required.

Data Loggers for Water Level and Flow Measurements

The versatility of our data loggers allows systems to be customized for each application. A range of data loggers, with increasing capabilities, is available. All our data loggers feature wide operating temperature ranges, low power consumption, and the ability to directly interface with a large variety of sensors. Because our data loggers operate on batteries (with or without solar panels), they are ideal for long-term, stand-alone operation, such as at remote stilling wells. If additional channels are needed, most of our data loggers are expandable using multiplexers and other peripherals. Powerful on-board instruction sets allow unattended control decisions based on time or conditional events. For example, if measured levels are outside a predetermined range, the data logger can sound alarms, open valves or gates, or call out to a phone to report conditions. Data are typically displayed and stored in the desired units of measure (e.g., cfs, psi, feet, inches, meters, centimeters).

Sensors for Water Level and Flow Measurements

Thanks to their ability to measure multiple channel types, our data loggers can read nearly every commercially available sensor, allowing systems to be customized for each installation. We offer a variety of water level and flow sensors that feature low drift and high reliability. In addition, nearly all available water quality and meteorological sensors can be measured, generally without external signal conditioning. We helped create the original SDI-12 standard, so you can be sure our systems are SDI-12 compatible.

Communications

The availability of multiple telecommunications and on-site options for retrieving data also allows systems to be customized to meet exact needs. Off-the-shelf telecommunications options include satellite (DCP), radio, telephone, cellphone, and voice-synthesized phone. Systems can be programmed to send alarms or report site conditions by calling out to computers, phones, radios, or pagers. Real-time or historical data can be displayed or processed with Campbell Scientific software. Data can also be exported as ASCII files for further processing by spreadsheets, databases, or analysis programs.

案例研究

路易斯安那州: 天坑监测
In August 2012, RESPEC was contracted to provide field instrumentation and early-warning monitoring services at......阅读更多
南达科他州: 管式灌溉系统
The semiarid region just north of the Black Hills in western South Dakota has vast......阅读更多
阿肯色州:洪水预警
Hot Springs, Arkansas, is a history-rich city located adjacent to Hot Springs National Park. The......阅读更多
佛罗里达州: 分洪控制系统
Florida’s Melbourne-Tillman Water Control District (MTWCD) includes levees to protect the area from flooding by......阅读更多
秘鲁: 冰川监测
The water supplied by melting glaciers in the high Andes mountains is critical to many......阅读更多
新泽西: 鳟鱼养殖监测
Moving clean, cold water through a trout-rearing facility is essential to its success. A live......阅读更多
犹他州: 供水系统
In 2010, Trenton and Amalga, two northern Utah towns separated by only a few miles,......阅读更多
犹他州: 布里格姆洪水预警系统
In the past, home and business owners along the creek that comes from Mantua Reservoir,......阅读更多

常见问题解答

地表水: 1

  1. Most Campbell Scientific systems are built from individual components. This provides maximum flexibility for our customers, but it does not lend itself to pricing a "typical" system. Contact Campbell Scientific for assistance in pricing a system to meet the unique needs of the application.


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