CHAPTER 1 - INTRODUCTION
2. Benefits of Better Water Measurement
Besides proper billing for water usage, many benefits are derived by
upgrading water measurement programs and systems. Although some of the
benefits are intangible, they should be considered during system design
or when planning a water measurement upgrade. Good water management requires
accurate water measurement. Some benefits of water measurement are:
- Accurate accounting and good records help allocate equitable shares
of water between competitive uses both on and off the farm.
- Good water measurement practices facilitate accurate and equitable
distribution of water within district or farm, resulting in fewer problems
and easier operation.
- Accurate water measurement provides the on-farm irrigation decision-maker
with the information needed to achieve the best use of the irrigation water
applied while typically minimizing negative environmental impacts.
- Installing canal flow measuring structures reduces the need for time-consuming
current metering. Without these structures, current metering is frequently
needed after making changes of delivery and to make seasonal corrections
for changes of boundary resistance caused by weed growths or changes of
sectional shape by bank slumping and sediment deposits.
- Instituting accurate and convenient water measurement methods improves
the evaluation of seepage losses in unlined channels. Thus, better determinations
of the cost benefits of proposed canal and ditch improvements are possible.
- Permanent water measurement devices can also form the basis for future
improvements, such as remote flow monitoring and canal operation automation.
- Good water measurement and management practice prevents excess runoff
and deep percolation, which can damage crops, pollute ground water with
chemicals and pesticides, and result in project farm drainage flows containing
- Accounting for individual water use combined with pricing policies
that penalize excessive use.