Twenty-three unsolved problems in hydrology (UPH) – a community perspective

This paper is the outcome of a community initiative to identify major unsolved scientific problems in hydrology motivated by a need for stronger harmonisation of research efforts. The procedure involved a public consultation through on-line media, followed by two workshops through which a large number of potential science questions were collated, prioritised, and synthesised. In spite of the diversity of the participants (230 scientists in total), the process revealed much about community priorities and the state of our science: a preference for continuity in research questions rather than radical departures or redirections from past and current work. Questions remain focussed on process-based understanding of hydrological variability and causality at all space and time scales. Increased attention to environmental change drives a new emphasis on understanding how change propagates across interfaces within the hydrological system and across disciplinary boundaries. In particular, the expansion of the human footprint raises a new set of questions related to human interactions with nature and water cycle feedbacks in the context of complex water management problems. We hope that this reflection and synthesis of the 23 unsolved problems in hydrology will help guide research efforts for some years to come

Lethal Violence and, State Formation in Cambodia

This paper estimates homicide rates and describes the nature of violence and crime for Cambodia. Limited data allows only a partial picture of the trends and nature of lethal violence. Post-war economic adversity combined with a weak state and underdeveloped "legal culture" contributed to an elevated rate of homicide. Frequent acts of murder-robbery, mayhem, political violence and banditry present a major threat to social and economic development. A murder incident rate of approximately 5.7 per 100,000 but a homicide rate of 9.3 per 100,000 was estimated for 1996, higher than most countries in the region except the Philippines. Political and economic adversity drove the homicide rate to 11.6 per 100,000 in 1998 similar to levels reached during 1993 the year of the first national elections. Usually homicides were between males and commonly arose from robbery, disputes and quarrels with most deaths resulting from gunfire. Extra-judicial death arising from police or "mob" actions accounted for high rates of suspect/offender death and contributed significantly to the homicide rate. Rates of violent crime were higher in rural areas but Phnom Penh experienced higher levels of property crime than the provinces. The homicide rate is compared with neighbouring countries and the roles of modernisation, policing and crime are discussed

The Timing of Motherhood, Mothers' Employment and Child Outcomes

The last decades of the twentieth century have witnessed, as part of the second demographic transition affecting most industrial countries (Van de Kaa, 1987), two features of particular interest here – a delay in entry to motherhood and an increased chance of women being employed even after they have children. In Britain, these trends have not been experienced uniformly across the social spectrum. The research reported in this chapter attempts to establish links between these two phenomena, to quantify the extent of social differentials (in the timing of first motherhood and maternal employment) and to investigate their impact on the development of childre