Precipitation and Temperature (1979-2020) and Annual Streamflow (1959-2001) Data for Sasumua River Watershed, Kenya.

<p>The Sasumua River Watershed in Kenya covers an area of 107 km<sup>2</sup>. The Sasumua River Watershed is a headwaters subwatershed of the Tana River Basin in Kenya. It is located within latitudes 0°39′0″ S and 0°46′48″ S and longitudes 36°34′48″ E and 36°40′48″ E. Elevations range between 2,200 m and 3,850 m above mean sea level. The average annual rainfall ranges from 1,000–1,600 mm. Land use in the watershed is primarily agricultural and forested. Waters from the Sasumua Dam provide 20% of the water supply for the City of Nairobi. The western and central parts of the watershed are characterized by poorly drained soils. Erosion and flooding in the western and central parts, and general land degradation in the watershed are key concerns impacting watershed water quality. (Mwangi et al., 2015).</p>

<p><br />
This dataset comprises Climate Forecast System Reanalysis (CFSR, Saha et al., 2010) precipitation and temperature data and aggregated streamflow data as available and shareable for the Sasumua River Watershed.<a name="_Hlk64229484"></a></p>

<p><a name="_Hlk64229484">The data can be used for hydrologic and water quality modeling or other water resources applications and are formatted for easy use with such applications. Detailed metadata are provided with the dataset.  </a></p>

<p>The following data are included with the dataset:</p>

<ul>
<li>CFSR data (daily precipitation and temperature)</li>
<li>Sasumua River Gaging Station (annual streamflow)</li>
<li>Kimakia River Gaging Station (annual streamflow)</li>
<li>Sasumua Other Water Data (aggregated reservoir information)</li>
</ul>

<p> </p>

<p>The data are packaged and deployed so as to be Findable, Accessible, Interoperable, and Reusable (FAIR) in accordance with open data FAIR Guiding Principles (Wilkinson et al, 2016).</p>

<p><strong>Primary Data Columns:</strong></p>

<ul>
<li>date: Calendar date (YYYY-MM-DD)</li>
<li>prcpmm: Daily precipitation (mm)</li>
<li>tmin_c: Daily Minimum Temperatures (degrees Celsius)</li>
<li>tmax_c: Daily Maximum Temperatures (degrees Celsius)</li>
<li>meanflow-cms: mean flow in m<sup>3</sup>/s</li>
<li>minflow-cms: minimum flow, m<sup>3</sup>/s</li>
<li>maxflow-cms: maximum flow, m<sup>3</sup>/s</li>
</ul>

<p><strong>Data Sources:</strong></p>

<p>Original Reanalysis Data: Retrieved from National Centers for Environmental Prediction Climate Forecast System Reanalysis Versions 1 and 2 (https://doi.org/10.5065/D69K487J, <a href="https://doi.org/10.5065/D61C1TXF">https://doi.org/10.5065/D61C1TXF</a>);</p>

<p>Raw Streamflow Data: Obtained from Kenya Water Resources Management Authority (<a href="https://wra.go.ke/">https://wra.go.ke/</a>).</p>

<p>Other Water Data: ETC East Africa Ltd, 2012. Upper Tana-Nairobi Water Fund Technical Report. The Nature Conservancy. (<a href="https://s3.amazonaws.com/tnc-craft/library/Upper-Tana-Nairobi-Water-Fund-Technical-Report_Feasibility-Phase.pdf?mtime=20180107044043">https://s3.amazonaws.com/tnc-craft/library/Upper-Tana-Nairobi-Water-Fund-Technical-Report_Feasibility-Phase.pdf?mtime=20180107044043</a>)</p>

<p> </p>

<p><strong>Funding Acknowledgement</strong></p>

<p>This dataset was made possible in part through support provided by the Center for Development Research, U.S. Global Development Lab (Lab), U.S. Agency for International Development, through the LASER PULSE Program under the terms of Cooperative Agreement No. 7200AA18CA00009. The opinions expressed herein are those of the author(s) and do not necessarily reflect the views of the U.S. Agency for International Development.</p>