Bibcode
Baptista, I.; Ferreira, A. D.; Tavares, J.; Querido, A. L. E.; Reis, A. E. A.; Geissen, V.; Ritsema, C.; Varela, A.
Bibliographical reference
EGU General Assembly 2012, held 22-27 April, 2012 in Vienna, Austria., p.6481
Advertised on:
4
2012
Citations
0
Refereed citations
0
Description
Cape Verde, located off the coast of Senegal in western Africa, is a
volcanic archipelago where a combination of human, climatic,
geomorphologic and pedologic factors has led to extensive degradation of
the soils. Like other Sahelian countries, Cape Verde has suffered the
effects of desertification through the years, threatening the livelihood
of the islands population and its fragile environment. In fact, the
steep slopes in the ore agricultural islands, together with semi-arid
and arid environments, characterized by an irregular and poorly
distributed rainy season, with high intensity rainfall events, make
dryland production a challenge. To survive in these fragile conditions,
the stabilization of the farming systems and the maintenance of
sustainable yields have become absolute priorities, making the islands
an erosion control laboratory. Soil and water conservation strategies
have been a centerpiece of the government's agricultural policies
for the last half century. Aiming to maintain the soil in place and the
water inside the soil, the successive governments of Cape Verde have
implemented a number of soil and water conservation techniques, the most
common ones being terraces, half moons, live barriers, contour rock
walls, contour furrows and microcatchments, check dams and reforestation
with drought resistant species. The soil and water conservation
techniques implemented have contributed to the improvement of the
economical and environmental conditions of the treated landscape, making
crop production possible, consequently, improving the livelihood of the
people living on the islands. In this paper, we survey the existing soil
and water conservation techniques, analyze their impact on the
livelihood condition of the population through a thorough literature
review and field monitoring using a semi-quantitative methodology and
evaluate their effectiveness and impact on crop yield in the Ribeira
Seca watershed. A brief discussion is given on the cost and
effectiveness of the techniques to reduce soil erosion and to promote
rainfall infiltration. Finally, we discuss the critical governance
factors that lead to the successful implementation of such strategy in a
country with scarce natural resources.