http://hdl.handle.net/1721.1/7800 Thu, 23 May 2013 16:25:57 GMT 2013-05-23T16:25:57Z http://hdl.handle.net/1721.1/77869 A study of the auglaize hydro-electric development of the Defiance Gas and Electric Company Santos, Adolpho; Moll, Edward H Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1924.; Includes bibliographical references. Tue, 01 Jan 1924 00:00:00 GMT http://hdl.handle.net/1721.1/77869 1924-01-01T00:00:00Z http://hdl.handle.net/1721.1/70758 An observing system simulation experiment for soil moisture measurements from the SMAP radiometer Konings, Alexandra Georges The Soil Moisture Active Passive (SMAP) satellite, to be launched in 2013, will use both radiometer and radar data to estimate soil moisture. Improved soil moisture knowledge has many applications in hydroclimatology, numerical weather prediction, flood forecasting, and human health. In this thesis, an observing system simulation experiment (OSSE) was used to study the error structure of radiometer measurements using two different retrieval algorithms. In an OSSE, geophysical fields are used to create a model of surface emission, which is coupled to an orbital sampling module and proposed retrieval algorithms. Comparing output from the retrieval algorithm to the starting soil moisture values demonstrates retrieval error. Significant uncertainty remains about the optimal representation of the effect of dielectric mixing, soil roughness, and vegetation opacity on radiometric emissions at a given soil moisture. The effect of this uncertainty on retrieval algorithms is studied by using different representations for each term in the forward and retrieval modules of the OSSE. Uncertainty due to roughness causes less error than errors in dielectric mixing and vegetation opacity treatment. In both algorithms, the retrieval shows a spatially variable bias, which is particularly large when using a single-polarization retrieval algorithm. The spatial and temporal variation of the bias, and the implications for characterization and removal of this bias as a possible error reduction strategy, are discussed. Thesis (S.B. in Environmental Engineering Science)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2009.; Cataloged from PDF version of thesis.; Includes bibliographical references (p. 57-61). Thu, 01 Jan 2009 00:00:00 GMT http://hdl.handle.net/1721.1/70758 2009-01-01T00:00:00Z http://hdl.handle.net/1721.1/65237 Comparative costs of hydro-electric plants no. 3 & 4 of the New England Power Company of the Deerfield River at Shelburne Falls, Massachusetts Goodman, Harry; Ginsburg, Nathan Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Civil and Sanitary Engineering, 1924.; Includes bibliographical references (leaves ). Tue, 01 Jan 1924 00:00:00 GMT http://hdl.handle.net/1721.1/65237 1924-01-01T00:00:00Z http://hdl.handle.net/1721.1/64895 A study of a hydro-electric development at Kezar Falls, Maine Ridlon, Myron George; Mitchell, Irvin Rea Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1930 [first author], and Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of General Engineering, 1930 [second author].; MICROFICHE COPY AVAILABLE IN ENGINEERING. Wed, 01 Jan 1930 00:00:00 GMT http://hdl.handle.net/1721.1/64895 1930-01-01T00:00:00Z