The 'Arco Seco' or 'Dry Arc' region of the Republic of Panama is considered to be the driest in the country, where many areas of this region experience severe water stress during the months of January through May. This study was conducted to develop a tool for the assessment of sustainable implementation of water harvesting through ponds for agricultural purposes in the region. A computer based Decision Support System (DSS) has been developed specifically for the Arco Seco region in order to facilitate pond storage capacity estimation. As part of the DSS, four computer programs have been designed for four different case scenarios; the first one is for sites that have high water demand and no topographical restrictions for pond size; the second is for fairly high water demand, no topographical restrictions for pond size, and for farmers who wish to have a backup of water to use mostly during drier years; the third is for low water demand, usage during the dry season only, and topographical restrictions for pond size, and finally the fourth is for constant water demand throughout the year, and for sites where runoff is the only water source.* / *This dissertation is a compound document (contains both a paper copy and a CD as part of the dissertation).

Reforestation is being considered as a mitigation option to help combat the climate change predicted to result from atmospheric carbon dioxide pollution. Forestry-based carbon storage projects are being introduced in many tropical countries, and assessment of species-specific carbon storage potentials is made difficult by a lack of species-level information. This study focuses on teak (Tectona grandis), to measure many of the characteristics affecting the carbon storage potential both of the trees themselves and of the plantations they are in. Root-to-shoot ratio, above- and belowground biomass, as well as tissue carbon content were measured in 20-year-old teak trees in Panamanian plantations. A regression relating diameter at breast height (DBH) to total tree carbon storage for trees of various sizes was developed. To scale up to the plantation level, this regression was used to estimate the carbon storage of the trees of four plantations. Litter, undergrowth, and soil were studied to estimate carbon storage in these compartments. These estimates were collated to form a global estimate of carbon storage in Panamanian harvest age teak plantations. Various methods of calculation of carbon storage in short-rotation plantations are discussed. This work will allow greater precision in the assessment of carbon storage in individual plantations.

No description available.

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Source: Dissertation Abstracts International, Volume: 70-06, Section: B, page: 3460. Adviser: Carl S. Hacker. Includes bibliographical references.

Thesis (Ph. D.)--Stanford University, 1914. / "Essay ... awarded the Justin Winsor Prize in American history for 1914." Includes bibliographical references (p. 331-345) and index.

Thesis (Ph. D.)--University of Pennsylvania, 1929. / Bibliography: p. 110-111.

Thesis (Ph. D.)--Stanford University, 1914. / "Essay ... awarded the Justin Winsor Prize in American history for 1914." Includes bibliographical references (p. 331-345) and index.

Thesis (M.S.)--University of Wisconsin--Madison, 1967. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Nous traiterons successivement des circonstances de l'émergence du Panama depuis la période précolombienne, les premières expéditions espagnoles à la recherche d'un détroit vers les Indes, de l'indépendance du Panama. Dans la première partie, nous traiteront de l'Isthme du Panama comme terre de passage et de son Canal de1880 à 1914, du rêve séculaire à la réalité où, successivement, nous étudierons son destin français, sa position entre intérêts français et aspirations américaines. Les États-Unis et le Panama nous conduiront à traiter de l'installation des Américains, la construction du Canal (1904-1914) ; les traités Carter-Torrijos, entre compromis et ambiguïtés. La deuxième partie traitera des stratégies de développement du Panama; l'importance des facteurs socioéconomiques et la dynamique des structures sociopolitiques seront mises en exergue. L'intégration des Antillais de Guadeloupe et de Martinique dans le cercle communautaire panaméen de 1914 à nos jours. Àcet égard, nous traiterons des apports de la culture antillaise dans la représentation panaméenne, un brassage culturel. En troisième lieu, leur contribution à l'essor de la nation. Il s'agira ici d'étudier les arts et la culture, la musique et les danses, la littérature et la linguistique de même que les revendications culturelles des minorités ethniques. Enfin, nous orienterons nos recherches sur la question de l'unité panaméenne à l'aube du Ille millénaire, l'organisation des diverses communautés et l'installation européenne au Panama. / We will successively deal with the circumstances of the emergence of Panama since the pre-Colum bian period, the first Spanish shipping expeditions in search of a strait towards India, and the independence of Panama. ln the first part, we shall deal with the Isthmus of Panama as a land of passage and with its Channel from 1880 to 1914, from the secular dream to reality where, successively, we shall study its French fate, its position in regards to French interests and American aspiration. The relationship between the United States and Panama will lead us to deal with the settling of the Americans, the construction of the Channel (1904-1914), the "Carter-Torrijos" treaties, between compromises and ambiguities. The second part will deal with strategies of development for Panama; the importance of socioeconomic factors and the dynamics of the sociopolitical structures will be highlighted. The integration of the people of Guadeloupe and Martinique in the Panamanian community circle from 1914 to nowadays. In this respect, we shall treat contributions of the French West Indian culture within the Panamanian representation; the cultural admixture. In the third part, their contribution at the development of the Panamanian nation. The issue will be to study arts and culture, music and dances, Iiterature and Iinguistics as weil as the cultural demands from ethnic minorities. Finally, we shall direct our researches towards the question of Panamanian unity at the dawn of the third millennium, the organization of the diverse communities and the European settling in Panama