Secondary data reviews, field observation, and interviews were conducted to collect and triangulate information about the name and address of each hotpot, and the estimated size of target groups.
At this point in the analytical process, secondary data sources were triangulated (Fielding and Fielding, 1986; Patton, 2002) and included within the analytical memo.
The estimation of soil organic carbon (SOC) stocks in these areas will have to rely on the limited available secondary data coupled with restricted field sampling.
Quantitative amounts of the factors affecting groundwater quality included the average depth of water table, the transmissivity of aquifer formations, distance from the pollutant centers, site elevation and the number of households were estimated based on the secondary data, digital maps and field studies.
Interviews, clinical measurements, and secondary data collection in the field addressed the major topics: nutritional status, prevalence of hypertension and diabetes mellitus in women, child hospitalization, prevalence of tuberculosis and malaria in women, access to health services and programs, and characteristics of the domestic economy and diet.
In the post-fieldwork, data processing analysis of primary and secondary data obtained from pre-field and fieldwork was the main activity.
Other secondary data included observations at supplier field days and informal personal communication with suppliers and company personnel.
Two approaches were employed in this study: (1) ex-ante approach involving field survey and secondary data analysis from ancillary sources and (2) hydrochemical approach for the measurement of water quality parameters from springs.
In addition to the field investigations, additional secondary data were compiled from different sources on waste cohesion and internal friction angle of the deposit (Koelsch et al. [2005]), and gas content within the landfill (P.T. Perusahaan Gas Negara and Perusahaan Daerah Kebersihan Kota Bandung [2000]).
In this study, various basic thematic layers were created from different source including map, field study, satellite image and secondary data based on multi-criteria analysis method.
