ISSN (Print) - 0012-9976 | ISSN (Online) - 2349-8846

ConstructionSubscribe to Construction

Time for a Massive Fiscal Stimulus

Only bold interventions by the government can ensure a quick recovery of the economy.

A Novel Approach to Understanding Delhi’s Complex Air Pollution Problem

With rising concerns about the steep increase in air pollution in the National Capital Territory of Delhi, several factors—particularly motorised transportation, construction, and stubble burning in neighbouring states—are being identified as contributing to this hazard. However, in order to make effective policy decisions, there is a need for a holistic approach that identifies the root causes of the problem. The use of system dynamics simulation offers a novel systems thinking approach to understand Delhi’s air pollution, taking into account the dynamic nature of the air pollution system as well as the complex interdependencies among the various factors and sources of air pollution.

Well Worth the Effort

More than 1,00,000 wells were sanctioned for construction under the Mahatma Gandhi National Rural Employment Guarantee Act in Jharkhand during the last few years. This study evaluates the outcome of this well-construction drive through a survey of nearly 1,000 wells in 24 randomly selected gram panchayats. A majority of sanctioned wells (60% with parapet and 70% without) were completed at the time of the survey. Nearly 95% of completed wells are being utilised for irrigation, leading to a near tripling of agricultural income of those in the command area. The real rate of return from these wells in Jharkhand is estimated to be close to 6%, a respectable figure for any economic investment. However, well construction involves some out-of-pocket expenses and this investment is risky: nearly 12% of the wells were abandoned midway.
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