Changing patterns and perceptions of water use in east central texas since the time of anglo settlement

Patterns and perceptions of water use have changed since Anglo settlement in Texas in the early nineteenth century. Change has not been constant, gradual, or linear, but rather has occurred in fits and spurts. This pattern of punctuated equilibrium in water use regimes is the central finding of this dissertation. Water use is examined in terms of built, organizational, and institutional inertias that resist change in the cultural landscape. Change occurs only when forced by crisis and results in water management at an increasing scale. Perception is critical in forcing response to crisis. Four water use regimes are identified. The agrarian regime was characterized by individual family and plantation units that were self-sufficient in their water supply. Water was perceived as abundant, but used sparingly. The agrarian regime began with Texas’s declaration of independence from Mexico in 1836 and lasted for the remainder of the nineteenth century. The waterworks regime was characterized by the introduction of piped water. During this second regime, water was still perceived as abundant, but was also taken for granted. The crisis forcing the waterworks regime was the need for better fire protection in cities. The almost constant threat of flood and drought, underscored by the Drought of the 1950s, in conjunction with a demographic shift, brought about the dam and levee regime. As a consequence of the Drought of the 1950s, water was for the first time perceived as scarce. We have just entered the groundwater regime. Recent water legislation and a state supreme court decision in favor of a bottled water company are putting new emphasis on groundwater sales from rural property owners to municipal water companies. Empirical studies supporting this theoretical framework are drawn from the heretofore unpublished 1868 journal of Pleasant B. Watson, from municipal bond records in the archives of the Texas Comptroller, from the early history of the waterworks at Bryan, Texas, from newly discovered records of a levee along the Brazos River, from an overview of dam and reservoir construction, and from a recent proliferation of groundwater districts

Intersymbol interference caused by realizable filters in a three-phase communication system

A ternary communication system is shown to provide better performance than similar binary or quadraphase systems by as much as 0.7 dB of SNR. The effect of realizable filters in the channel is studied by simulating the system numerically. Systems utilizing first- and second-order Butterworth filters with BT products of 1.0 and 1.5 are studied and corresponding performance curves are plotted.Electrical and Computer Engineering, Department o