This study diagnoses the spatio-temporal variation of three major hydroclimatic variables (temperature, precipitation and evaporation) estimated from four general circulation models participating in the Fifth Phase of the Coupled Model Intercomparision Project (CMIP5). Changes in climate regime are analyzed across India for the historical scenario (1850–2005) and for the RCP8.5 scenario (2006–2100). The study provides a relative assessment of projected changes in climatic pattern over different zones in India, broadly divided as southern, Eastern, Western, Central, North-Eastern and Himalayan regions. Monthly data for both the scenarios were obtained, and all the data were re-gridded to a common resolution. All the models show a stronger warming in the future as compared to the historical period. The North-Eastern, Northern and Himalayan regions are likely to be severely affected. Though inconsistencies have been observed among the models, the majority of them predict an increase in precipitation in future, with a major increment in southern cities. The Himalayan belt is expected to receive heavy rainfall in the summer season, with little change in the winter season. Most of the regions are not expected to experience change in evaporation in pre-monsoonal months, but substantial change is expected in some regions during monsoonal and post-monsoonal months.
Maximizing membrane life: lessons learned from a three year study on performance recovery
Abstract Reverse Osmosis (RO) membranes are susceptible to several different types of foulants and scales. Common foulants observed in RO systems are organics, metals, clays and colloidal material. Common scales that are observed are carbonate, phosphate, sulfate and silica. Onsite cleaning is the norm to remove these foulants and scales but sometimes a desire for cleaning optimization or a requirement for process troubleshooting leads operators to undertake a more detailed investigation. Therefore, one option...
Large TCE Plume with Extensive DNAPL - Case Study
ABSTRACT High density sampling program was key to remediation of soil and groundwater impacted by TCE DNAPL at a former industrial site underlain by river deposits and sedimentary bedrock. CHALLENGES Impacted alluvium consisted of poorly sorted, fine to coarse grained sand. The source area was underlain by an aquitard of silt and clayey silt where dense non-aqueous phase liquid (DNAPL) pooled at the interface. Impacts did not extend into the underlying claystone bedrock. Solute transport was dictated by...
EPA Convenes Hearing On Proposed Renewables Enhancement and Growth Support Rule
On December 6, 2016, EPA held a hearing on its proposed Renewables Enhancement and Growth Support rule. The proposed rule would update the regulatory structure to allow biofuel producers to process and convert biomass at different facilities, update fuel regulations to allow for more high-ethanol fuel blends in flex fuel vehicles, and permit cellulosic biofuels to be produced from new feedstock sources. Testimony provided by Growth Energy and the Renewable Fuels Association (RFA) focused on the impact of the...
Energy Storage 301: Solar + Storage Economics - Case Study
In this post we examine the economics of solar + storage. Specifically, we calculate the value of solar and storage for two commercial buildings in each of three markets: California, New York, and Hawaii. We find solar and storage are strongly synergistic in all three markets. The NPVs of solar + storage investments are greater than the sum of the NPVs of solar investments and storage investments alone because, among other reasons: The combination allows for much larger demand charge reductions than either...
Farm Practices to Preserve Fruit Quality After Harvesting
The success of a farmer’s effort in crop production depends largely on the final phase of production, which is often followed by post-harvest losses that can reach up to 50%. Reducing this waste could improve global food production, and increase overall farmer’s profit. Activities that are carried out just before harvesting may have a major influence on final production. Post-harvest management is a process that starts from the activities that take place on the field, before harvesting, and it...